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Finding the Fourth Proportional to 442,876.30, 664,411.65 and 143,305.90

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Solution

The fourth proportional to 442,876.30, 664,411.65 and 143,305.90 is: 214,990.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,876.30 : 664,411.65 = 143,305.90 : x
  2. Step 2: Convert to fraction form
    442,876.30/664,411.65 = 143,305.90/x
  3. Step 3: Cross multiply
    442,876.30x = 664,411.65 × 143,305.90
  4. Step 4: Simplify right side
    442,876.30x = 95,214,109,473.74
  5. Step 5: Solve for x
    x = 95,214,109,473.74/442,876.30
  6. Step 6: Final answer
    x = 214,990.30

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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.