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Finding the Fourth Proportional to 762.30, 1,142.91 and 329.58

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Solution

The fourth proportional to 762.30, 1,142.91 and 329.58 is: 494.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.30 : 1,142.91 = 329.58 : x
  2. Step 2: Convert to fraction form
    762.30/1,142.91 = 329.58/x
  3. Step 3: Cross multiply
    762.30x = 1,142.91 × 329.58
  4. Step 4: Simplify right side
    762.30x = 376,680.28
  5. Step 5: Solve for x
    x = 376,680.28/762.30
  6. Step 6: Final answer
    x = 494.14

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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.