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Finding the Fourth Proportional to 408,531.20, 611,587.20 and 303,814.40

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Solution

The fourth proportional to 408,531.20, 611,587.20 and 303,814.40 is: 454,822.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,531.20 : 611,587.20 = 303,814.40 : x
  2. Step 2: Convert to fraction form
    408,531.20/611,587.20 = 303,814.40/x
  3. Step 3: Cross multiply
    408,531.20x = 611,587.20 × 303,814.40
  4. Step 4: Simplify right side
    408,531.20x = 185,808,998,215.68
  5. Step 5: Solve for x
    x = 185,808,998,215.68/408,531.20
  6. Step 6: Final answer
    x = 454,822.05

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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.