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Finding the Fourth Proportional to 231.24, 316.61 and 230.43

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Solution

The fourth proportional to 231.24, 316.61 and 230.43 is: 315.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.24 : 316.61 = 230.43 : x
  2. Step 2: Convert to fraction form
    231.24/316.61 = 230.43/x
  3. Step 3: Cross multiply
    231.24x = 316.61 × 230.43
  4. Step 4: Simplify right side
    231.24x = 72,957.02
  5. Step 5: Solve for x
    x = 72,957.02/231.24
  6. Step 6: Final answer
    x = 315.50

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.