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Finding the Fourth Proportional to 1,153.83, 1,731.02 and 423.75

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Solution

The fourth proportional to 1,153.83, 1,731.02 and 423.75 is: 635.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,153.83 : 1,731.02 = 423.75 : x
  2. Step 2: Convert to fraction form
    1,153.83/1,731.02 = 423.75/x
  3. Step 3: Cross multiply
    1,153.83x = 1,731.02 × 423.75
  4. Step 4: Simplify right side
    1,153.83x = 733,517.61
  5. Step 5: Solve for x
    x = 733,517.61/1,153.83
  6. Step 6: Final answer
    x = 635.72

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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.