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Finding the Fourth Proportional to 229.81, 344.87 and 85.53

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Solution

The fourth proportional to 229.81, 344.87 and 85.53 is: 128.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.81 : 344.87 = 85.53 : x
  2. Step 2: Convert to fraction form
    229.81/344.87 = 85.53/x
  3. Step 3: Cross multiply
    229.81x = 344.87 × 85.53
  4. Step 4: Simplify right side
    229.81x = 29,496.73
  5. Step 5: Solve for x
    x = 29,496.73/229.81
  6. Step 6: Final answer
    x = 128.35

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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.