Home / 1,187,084,042.69-1,638,170,731.18-678,438,270.13

Finding the Fourth Proportional to 1,187,084,042.69, 1,638,170,731.18 and 678,438,270.13

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Solution

The fourth proportional to 1,187,084,042.69, 1,638,170,731.18 and 678,438,270.13 is: 936,241,813.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,084,042.69 : 1,638,170,731.18 = 678,438,270.13 : x
  2. Step 2: Convert to fraction form
    1,187,084,042.69/1,638,170,731.18 = 678,438,270.13/x
  3. Step 3: Cross multiply
    1,187,084,042.69x = 1,638,170,731.18 × 678,438,270.13
  4. Step 4: Simplify right side
    1,187,084,042.69x = 1,111,397,717,039,356,544
  5. Step 5: Solve for x
    x = 1,111,397,717,039,356,544/1,187,084,042.69
  6. Step 6: Final answer
    x = 936,241,813.61

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Half scale
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Double scale
Find fourth proportional to 1,187,084,043.69, 1,638,170,732.56 and 678,438,271.13
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.