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Finding the Fourth Proportional to 230.42, 345.36 and 127.68

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Solution

The fourth proportional to 230.42, 345.36 and 127.68 is: 191.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.42 : 345.36 = 127.68 : x
  2. Step 2: Convert to fraction form
    230.42/345.36 = 127.68/x
  3. Step 3: Cross multiply
    230.42x = 345.36 × 127.68
  4. Step 4: Simplify right side
    230.42x = 44,095.56
  5. Step 5: Solve for x
    x = 44,095.56/230.42
  6. Step 6: Final answer
    x = 191.37

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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.