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Finding the Fourth Proportional to 658,887.60, 988,331.40 and 392,948.40

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Solution

The fourth proportional to 658,887.60, 988,331.40 and 392,948.40 is: 589,422.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,887.60 : 988,331.40 = 392,948.40 : x
  2. Step 2: Convert to fraction form
    658,887.60/988,331.40 = 392,948.40/x
  3. Step 3: Cross multiply
    658,887.60x = 988,331.40 × 392,948.40
  4. Step 4: Simplify right side
    658,887.60x = 388,363,242,299.76
  5. Step 5: Solve for x
    x = 388,363,242,299.76/658,887.60
  6. Step 6: Final answer
    x = 589,422.60

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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.