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Finding the Fourth Proportional to 229.06, 315.90 and 140.47

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Solution

The fourth proportional to 229.06, 315.90 and 140.47 is: 193.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.06 : 315.90 = 140.47 : x
  2. Step 2: Convert to fraction form
    229.06/315.90 = 140.47/x
  3. Step 3: Cross multiply
    229.06x = 315.90 × 140.47
  4. Step 4: Simplify right side
    229.06x = 44,373.68
  5. Step 5: Solve for x
    x = 44,373.68/229.06
  6. Step 6: Final answer
    x = 193.72

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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.