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Finding the Fourth Proportional to 381,443.67, 572,175.23 and 115,212.87

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Solution

The fourth proportional to 381,443.67, 572,175.23 and 115,212.87 is: 172,822.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,443.67 : 572,175.23 = 115,212.87 : x
  2. Step 2: Convert to fraction form
    381,443.67/572,175.23 = 115,212.87/x
  3. Step 3: Cross multiply
    381,443.67x = 572,175.23 × 115,212.87
  4. Step 4: Simplify right side
    381,443.67x = 65,921,949,815.15
  5. Step 5: Solve for x
    x = 65,921,949,815.15/381,443.67
  6. Step 6: Final answer
    x = 172,822.24

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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.