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Finding the Fourth Proportional to 656,545.80, 984,818.70 and 420,155.40

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Solution

The fourth proportional to 656,545.80, 984,818.70 and 420,155.40 is: 630,233.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,545.80 : 984,818.70 = 420,155.40 : x
  2. Step 2: Convert to fraction form
    656,545.80/984,818.70 = 420,155.40/x
  3. Step 3: Cross multiply
    656,545.80x = 984,818.70 × 420,155.40
  4. Step 4: Simplify right side
    656,545.80x = 413,776,894,825.98
  5. Step 5: Solve for x
    x = 413,776,894,825.98/656,545.80
  6. Step 6: Final answer
    x = 630,233.10

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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.