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Finding the Fourth Proportional to 230.72, 345.63 and 153.42

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Solution

The fourth proportional to 230.72, 345.63 and 153.42 is: 229.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.72 : 345.63 = 153.42 : x
  2. Step 2: Convert to fraction form
    230.72/345.63 = 153.42/x
  3. Step 3: Cross multiply
    230.72x = 345.63 × 153.42
  4. Step 4: Simplify right side
    230.72x = 53,026.55
  5. Step 5: Solve for x
    x = 53,026.55/230.72
  6. Step 6: Final answer
    x = 229.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.