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Finding the Fourth Proportional to 717,988.97, 991,078.53 and 641,375.01

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Solution

The fourth proportional to 717,988.97, 991,078.53 and 641,375.01 is: 885,324.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,988.97 : 991,078.53 = 641,375.01 : x
  2. Step 2: Convert to fraction form
    717,988.97/991,078.53 = 641,375.01/x
  3. Step 3: Cross multiply
    717,988.97x = 991,078.53 × 641,375.01
  4. Step 4: Simplify right side
    717,988.97x = 635,653,002,089.54
  5. Step 5: Solve for x
    x = 635,653,002,089.54/717,988.97
  6. Step 6: Final answer
    x = 885,324.19

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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.