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Finding the Fourth Proportional to 231.04, 346.24 and 86.68

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Solution

The fourth proportional to 231.04, 346.24 and 86.68 is: 129.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    231.04 : 346.24 = 86.68 : x
  2. Step 2: Convert to fraction form
    231.04/346.24 = 86.68/x
  3. Step 3: Cross multiply
    231.04x = 346.24 × 86.68
  4. Step 4: Simplify right side
    231.04x = 30,012.08
  5. Step 5: Solve for x
    x = 30,012.08/231.04
  6. Step 6: Final answer
    x = 129.90

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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.