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Finding the Fourth Proportional to 657,721.27, 907,654.84 and 355,915.27

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Solution

The fourth proportional to 657,721.27, 907,654.84 and 355,915.27 is: 491,162.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,721.27 : 907,654.84 = 355,915.27 : x
  2. Step 2: Convert to fraction form
    657,721.27/907,654.84 = 355,915.27/x
  3. Step 3: Cross multiply
    657,721.27x = 907,654.84 × 355,915.27
  4. Step 4: Simplify right side
    657,721.27x = 323,048,217,445.41
  5. Step 5: Solve for x
    x = 323,048,217,445.41/657,721.27
  6. Step 6: Final answer
    x = 491,162.80

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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.