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Finding the Fourth Proportional to 657,489.89, 907,487.15 and 385,645.39

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Solution

The fourth proportional to 657,489.89, 907,487.15 and 385,645.39 is: 532,279.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,489.89 : 907,487.15 = 385,645.39 : x
  2. Step 2: Convert to fraction form
    657,489.89/907,487.15 = 385,645.39/x
  3. Step 3: Cross multiply
    657,489.89x = 907,487.15 × 385,645.39
  4. Step 4: Simplify right side
    657,489.89x = 349,968,231,684.79
  5. Step 5: Solve for x
    x = 349,968,231,684.79/657,489.89
  6. Step 6: Final answer
    x = 532,279.26

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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.