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Finding the Fourth Proportional to 658,853.10, 988,279.65 and 392,913.90

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Solution

The fourth proportional to 658,853.10, 988,279.65 and 392,913.90 is: 589,370.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,853.10 : 988,279.65 = 392,913.90 : x
  2. Step 2: Convert to fraction form
    658,853.10/988,279.65 = 392,913.90/x
  3. Step 3: Cross multiply
    658,853.10x = 988,279.65 × 392,913.90
  4. Step 4: Simplify right side
    658,853.10x = 388,308,811,572.14
  5. Step 5: Solve for x
    x = 388,308,811,572.14/658,853.10
  6. Step 6: Final answer
    x = 589,370.85

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Similar ratio
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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.