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Finding the Fourth Proportional to 767.46, 1,151.30 and 247.47

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Solution

The fourth proportional to 767.46, 1,151.30 and 247.47 is: 371.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.46 : 1,151.30 = 247.47 : x
  2. Step 2: Convert to fraction form
    767.46/1,151.30 = 247.47/x
  3. Step 3: Cross multiply
    767.46x = 1,151.30 × 247.47
  4. Step 4: Simplify right side
    767.46x = 284,912.21
  5. Step 5: Solve for x
    x = 284,912.21/767.46
  6. Step 6: Final answer
    x = 371.24

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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.