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Finding the Fourth Proportional to 408,812.96, 613,318.17 and 128,330.21

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Solution

The fourth proportional to 408,812.96, 613,318.17 and 128,330.21 is: 192,526.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,812.96 : 613,318.17 = 128,330.21 : x
  2. Step 2: Convert to fraction form
    408,812.96/613,318.17 = 128,330.21/x
  3. Step 3: Cross multiply
    408,812.96x = 613,318.17 × 128,330.21
  4. Step 4: Simplify right side
    408,812.96x = 78,707,249,552.92
  5. Step 5: Solve for x
    x = 78,707,249,552.92/408,812.96
  6. Step 6: Final answer
    x = 192,526.31

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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.