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Finding the Fourth Proportional to 1,153.86, 1,731.22 and 423.92

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Solution

The fourth proportional to 1,153.86, 1,731.22 and 423.92 is: 636.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.86 : 1,731.22 = 423.92 : x
  2. Step 2: Convert to fraction form
    1,153.86/1,731.22 = 423.92/x
  3. Step 3: Cross multiply
    1,153.86x = 1,731.22 × 423.92
  4. Step 4: Simplify right side
    1,153.86x = 733,898.78
  5. Step 5: Solve for x
    x = 733,898.78/1,153.86
  6. Step 6: Final answer
    x = 636.04

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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.