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Finding the Fourth Proportional to 408,077.10, 612,115.65 and 282,105.90

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Solution

The fourth proportional to 408,077.10, 612,115.65 and 282,105.90 is: 423,158.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,077.10 : 612,115.65 = 282,105.90 : x
  2. Step 2: Convert to fraction form
    408,077.10/612,115.65 = 282,105.90/x
  3. Step 3: Cross multiply
    408,077.10x = 612,115.65 × 282,105.90
  4. Step 4: Simplify right side
    408,077.10x = 172,681,436,347.34
  5. Step 5: Solve for x
    x = 172,681,436,347.34/408,077.10
  6. Step 6: Final answer
    x = 423,158.85

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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.