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Finding the Fourth Proportional to 657,974.80, 988,128.60 and 508,578.40

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Solution

The fourth proportional to 657,974.80, 988,128.60 and 508,578.40 is: 763,769.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,974.80 : 988,128.60 = 508,578.40 : x
  2. Step 2: Convert to fraction form
    657,974.80/988,128.60 = 508,578.40/x
  3. Step 3: Cross multiply
    657,974.80x = 988,128.60 × 508,578.40
  4. Step 4: Simplify right side
    657,974.80x = 502,540,862,382.24
  5. Step 5: Solve for x
    x = 502,540,862,382.24/657,974.80
  6. Step 6: Final answer
    x = 763,769.16

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.