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Finding the Fourth Proportional to 762.26, 1,142.71 and 329.27

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Solution

The fourth proportional to 762.26, 1,142.71 and 329.27 is: 493.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.26 : 1,142.71 = 329.27 : x
  2. Step 2: Convert to fraction form
    762.26/1,142.71 = 329.27/x
  3. Step 3: Cross multiply
    762.26x = 1,142.71 × 329.27
  4. Step 4: Simplify right side
    762.26x = 376,253.58
  5. Step 5: Solve for x
    x = 376,253.58/762.26
  6. Step 6: Final answer
    x = 493.61

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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.