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Finding the Fourth Proportional to 247.20, 370.66 and 91.02

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Solution

The fourth proportional to 247.20, 370.66 and 91.02 is: 136.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    247.20 : 370.66 = 91.02 : x
  2. Step 2: Convert to fraction form
    247.20/370.66 = 91.02/x
  3. Step 3: Cross multiply
    247.20x = 370.66 × 91.02
  4. Step 4: Simplify right side
    247.20x = 33,737.47
  5. Step 5: Solve for x
    x = 33,737.47/247.20
  6. Step 6: Final answer
    x = 136.48

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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.