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Finding the Fourth Proportional to 1,152.91, 1,729.46 and 422.47

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Solution

The fourth proportional to 1,152.91, 1,729.46 and 422.47 is: 633.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,152.91 : 1,729.46 = 422.47 : x
  2. Step 2: Convert to fraction form
    1,152.91/1,729.46 = 422.47/x
  3. Step 3: Cross multiply
    1,152.91x = 1,729.46 × 422.47
  4. Step 4: Simplify right side
    1,152.91x = 730,644.97
  5. Step 5: Solve for x
    x = 730,644.97/1,152.91
  6. Step 6: Final answer
    x = 633.74

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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.