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Finding the Fourth Proportional to 657,061.67, 906,939.03 and 385,188.41

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Solution

The fourth proportional to 657,061.67, 906,939.03 and 385,188.41 is: 531,673.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,061.67 : 906,939.03 = 385,188.41 : x
  2. Step 2: Convert to fraction form
    657,061.67/906,939.03 = 385,188.41/x
  3. Step 3: Cross multiply
    657,061.67x = 906,939.03 × 385,188.41
  4. Step 4: Simplify right side
    657,061.67x = 349,342,398,397.95
  5. Step 5: Solve for x
    x = 349,342,398,397.95/657,061.67
  6. Step 6: Final answer
    x = 531,673.69

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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.