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Finding the Fourth Proportional to 230.79, 318.48 and 193.86

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Solution

The fourth proportional to 230.79, 318.48 and 193.86 is: 267.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.79 : 318.48 = 193.86 : x
  2. Step 2: Convert to fraction form
    230.79/318.48 = 193.86/x
  3. Step 3: Cross multiply
    230.79x = 318.48 × 193.86
  4. Step 4: Simplify right side
    230.79x = 61,740.53
  5. Step 5: Solve for x
    x = 61,740.53/230.79
  6. Step 6: Final answer
    x = 267.52

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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.