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Finding the Fourth Proportional to 229.39, 316.46 and 155.77

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Solution

The fourth proportional to 229.39, 316.46 and 155.77 is: 214.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.39 : 316.46 = 155.77 : x
  2. Step 2: Convert to fraction form
    229.39/316.46 = 155.77/x
  3. Step 3: Cross multiply
    229.39x = 316.46 × 155.77
  4. Step 4: Simplify right side
    229.39x = 49,294.57
  5. Step 5: Solve for x
    x = 49,294.57/229.39
  6. Step 6: Final answer
    x = 214.90

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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.