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Finding the Fourth Proportional to 229.13, 343.70 and 66.81

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Solution

The fourth proportional to 229.13, 343.70 and 66.81 is: 100.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.13 : 343.70 = 66.81 : x
  2. Step 2: Convert to fraction form
    229.13/343.70 = 66.81/x
  3. Step 3: Cross multiply
    229.13x = 343.70 × 66.81
  4. Step 4: Simplify right side
    229.13x = 22,962.60
  5. Step 5: Solve for x
    x = 22,962.60/229.13
  6. Step 6: Final answer
    x = 100.22

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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.