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Finding the Fourth Proportional to 230.83, 346.21 and 76.76

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Solution

The fourth proportional to 230.83, 346.21 and 76.76 is: 115.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    230.83 : 346.21 = 76.76 : x
  2. Step 2: Convert to fraction form
    230.83/346.21 = 76.76/x
  3. Step 3: Cross multiply
    230.83x = 346.21 × 76.76
  4. Step 4: Simplify right side
    230.83x = 26,575.08
  5. Step 5: Solve for x
    x = 26,575.08/230.83
  6. Step 6: Final answer
    x = 115.13

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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.