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Finding the Fourth Proportional to 767.53, 1,151.17 and 219.59

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Solution

The fourth proportional to 767.53, 1,151.17 and 219.59 is: 329.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.53 : 1,151.17 = 219.59 : x
  2. Step 2: Convert to fraction form
    767.53/1,151.17 = 219.59/x
  3. Step 3: Cross multiply
    767.53x = 1,151.17 × 219.59
  4. Step 4: Simplify right side
    767.53x = 252,785.42
  5. Step 5: Solve for x
    x = 252,785.42/767.53
  6. Step 6: Final answer
    x = 329.35

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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.