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Finding the Fourth Proportional to 230.58, 318.25 and 157.07

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Solution

The fourth proportional to 230.58, 318.25 and 157.07 is: 216.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.58 : 318.25 = 157.07 : x
  2. Step 2: Convert to fraction form
    230.58/318.25 = 157.07/x
  3. Step 3: Cross multiply
    230.58x = 318.25 × 157.07
  4. Step 4: Simplify right side
    230.58x = 49,985.15
  5. Step 5: Solve for x
    x = 49,985.15/230.58
  6. Step 6: Final answer
    x = 216.78

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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.