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Finding the Fourth Proportional to 315,584.87, 435,508.72 and 172,344.92

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Solution

The fourth proportional to 315,584.87, 435,508.72 and 172,344.92 is: 237,836.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,584.87 : 435,508.72 = 172,344.92 : x
  2. Step 2: Convert to fraction form
    315,584.87/435,508.72 = 172,344.92/x
  3. Step 3: Cross multiply
    315,584.87x = 435,508.72 × 172,344.92
  4. Step 4: Simplify right side
    315,584.87x = 75,057,712,899.30
  5. Step 5: Solve for x
    x = 75,057,712,899.30/315,584.87
  6. Step 6: Final answer
    x = 237,836.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.