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Finding the Fourth Proportional to 408,404.70, 611,397.45 and 303,687.90

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Solution

The fourth proportional to 408,404.70, 611,397.45 and 303,687.90 is: 454,632.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,404.70 : 611,397.45 = 303,687.90 : x
  2. Step 2: Convert to fraction form
    408,404.70/611,397.45 = 303,687.90/x
  3. Step 3: Cross multiply
    408,404.70x = 611,397.45 × 303,687.90
  4. Step 4: Simplify right side
    408,404.70x = 185,674,007,655.86
  5. Step 5: Solve for x
    x = 185,674,007,655.86/408,404.70
  6. Step 6: Final answer
    x = 454,632.40

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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.