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Finding the Fourth Proportional to 230.88, 318.70 and 157.18

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Solution

The fourth proportional to 230.88, 318.70 and 157.18 is: 216.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.88 : 318.70 = 157.18 : x
  2. Step 2: Convert to fraction form
    230.88/318.70 = 157.18/x
  3. Step 3: Cross multiply
    230.88x = 318.70 × 157.18
  4. Step 4: Simplify right side
    230.88x = 50,093.27
  5. Step 5: Solve for x
    x = 50,093.27/230.88
  6. Step 6: Final answer
    x = 216.97

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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.