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Finding the Fourth Proportional to 230.42, 345.68 and 76.35

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Solution

The fourth proportional to 230.42, 345.68 and 76.35 is: 114.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.42 : 345.68 = 76.35 : x
  2. Step 2: Convert to fraction form
    230.42/345.68 = 76.35/x
  3. Step 3: Cross multiply
    230.42x = 345.68 × 76.35
  4. Step 4: Simplify right side
    230.42x = 26,392.67
  5. Step 5: Solve for x
    x = 26,392.67/230.42
  6. Step 6: Final answer
    x = 114.54

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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.