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Finding the Fourth Proportional to 522,920.60, 784,380.90 and 491,427.80

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Solution

The fourth proportional to 522,920.60, 784,380.90 and 491,427.80 is: 737,141.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,920.60 : 784,380.90 = 491,427.80 : x
  2. Step 2: Convert to fraction form
    522,920.60/784,380.90 = 491,427.80/x
  3. Step 3: Cross multiply
    522,920.60x = 784,380.90 × 491,427.80
  4. Step 4: Simplify right side
    522,920.60x = 385,466,580,049.02
  5. Step 5: Solve for x
    x = 385,466,580,049.02/522,920.60
  6. Step 6: Final answer
    x = 737,141.70

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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.