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Finding the Fourth Proportional to 221.16, 305.17 and 132.70

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Solution

The fourth proportional to 221.16, 305.17 and 132.70 is: 183.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.16 : 305.17 = 132.70 : x
  2. Step 2: Convert to fraction form
    221.16/305.17 = 132.70/x
  3. Step 3: Cross multiply
    221.16x = 305.17 × 132.70
  4. Step 4: Simplify right side
    221.16x = 40,494.96
  5. Step 5: Solve for x
    x = 40,494.96/221.16
  6. Step 6: Final answer
    x = 183.10

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.