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Finding the Fourth Proportional to 230.27, 318.02 and 156.78

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Solution

The fourth proportional to 230.27, 318.02 and 156.78 is: 216.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.27 : 318.02 = 156.78 : x
  2. Step 2: Convert to fraction form
    230.27/318.02 = 156.78/x
  3. Step 3: Cross multiply
    230.27x = 318.02 × 156.78
  4. Step 4: Simplify right side
    230.27x = 49,858.39
  5. Step 5: Solve for x
    x = 49,858.39/230.27
  6. Step 6: Final answer
    x = 216.53

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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.