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Finding the Fourth Proportional to 765.52, 1,147.64 and 635.15

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Solution

The fourth proportional to 765.52, 1,147.64 and 635.15 is: 952.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    765.52 : 1,147.64 = 635.15 : x
  2. Step 2: Convert to fraction form
    765.52/1,147.64 = 635.15/x
  3. Step 3: Cross multiply
    765.52x = 1,147.64 × 635.15
  4. Step 4: Simplify right side
    765.52x = 728,923.24
  5. Step 5: Solve for x
    x = 728,923.24/765.52
  6. Step 6: Final answer
    x = 952.20

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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.