Home / 1,187,084,041.69-1,638,170,729.80-678,438,269.13

Finding the Fourth Proportional to 1,187,084,041.69, 1,638,170,729.80 and 678,438,269.13

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Solution

The fourth proportional to 1,187,084,041.69, 1,638,170,729.80 and 678,438,269.13 is: 936,241,812.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,084,041.69 : 1,638,170,729.80 = 678,438,269.13 : x
  2. Step 2: Convert to fraction form
    1,187,084,041.69/1,638,170,729.80 = 678,438,269.13/x
  3. Step 3: Cross multiply
    1,187,084,041.69x = 1,638,170,729.80 × 678,438,269.13
  4. Step 4: Simplify right side
    1,187,084,041.69x = 1,111,397,714,455,512,576
  5. Step 5: Solve for x
    x = 1,111,397,714,455,512,576/1,187,084,041.69
  6. Step 6: Final answer
    x = 936,241,812.23

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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.