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Finding the Fourth Proportional to 408,545.40, 613,474.20 and 308,818.20

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Solution

The fourth proportional to 408,545.40, 613,474.20 and 308,818.20 is: 463,723.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,545.40 : 613,474.20 = 308,818.20 : x
  2. Step 2: Convert to fraction form
    408,545.40/613,474.20 = 308,818.20/x
  3. Step 3: Cross multiply
    408,545.40x = 613,474.20 × 308,818.20
  4. Step 4: Simplify right side
    408,545.40x = 189,451,998,190.44
  5. Step 5: Solve for x
    x = 189,451,998,190.44/408,545.40
  6. Step 6: Final answer
    x = 463,723.24

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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.