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Finding the Fourth Proportional to 657,988.20, 987,371.10 and 433,996.20

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Solution

The fourth proportional to 657,988.20, 987,371.10 and 433,996.20 is: 651,250.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,988.20 : 987,371.10 = 433,996.20 : x
  2. Step 2: Convert to fraction form
    657,988.20/987,371.10 = 433,996.20/x
  3. Step 3: Cross multiply
    657,988.20x = 987,371.10 × 433,996.20
  4. Step 4: Simplify right side
    657,988.20x = 428,515,305,389.82
  5. Step 5: Solve for x
    x = 428,515,305,389.82/657,988.20
  6. Step 6: Final answer
    x = 651,250.74

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Half scale
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Double scale
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Similar ratio
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1.5x scale

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.