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Finding the Fourth Proportional to 765.82, 1,148.79 and 562.91

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Solution

The fourth proportional to 765.82, 1,148.79 and 562.91 is: 844.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    765.82 : 1,148.79 = 562.91 : x
  2. Step 2: Convert to fraction form
    765.82/1,148.79 = 562.91/x
  3. Step 3: Cross multiply
    765.82x = 1,148.79 × 562.91
  4. Step 4: Simplify right side
    765.82x = 646,665.38
  5. Step 5: Solve for x
    x = 646,665.38/765.82
  6. Step 6: Final answer
    x = 844.41

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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.