Home / 1,187,084,057.45-1,638,170,751.51-678,438,284.85

Finding the Fourth Proportional to 1,187,084,057.45, 1,638,170,751.51 and 678,438,284.85

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Solution

The fourth proportional to 1,187,084,057.45, 1,638,170,751.51 and 678,438,284.85 is: 936,241,833.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,084,057.45 : 1,638,170,751.51 = 678,438,284.85 : x
  2. Step 2: Convert to fraction form
    1,187,084,057.45/1,638,170,751.51 = 678,438,284.85/x
  3. Step 3: Cross multiply
    1,187,084,057.45x = 1,638,170,751.51 × 678,438,284.85
  4. Step 4: Simplify right side
    1,187,084,057.45x = 1,111,397,754,945,879,936
  5. Step 5: Solve for x
    x = 1,111,397,754,945,879,936/1,187,084,057.45
  6. Step 6: Final answer
    x = 936,241,833.91

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Double scale
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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.