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Finding the Fourth Proportional to 338.30, 507.45 and 132.74

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Solution

The fourth proportional to 338.30, 507.45 and 132.74 is: 199.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.30 : 507.45 = 132.74 : x
  2. Step 2: Convert to fraction form
    338.30/507.45 = 132.74/x
  3. Step 3: Cross multiply
    338.30x = 507.45 × 132.74
  4. Step 4: Simplify right side
    338.30x = 67,358.91
  5. Step 5: Solve for x
    x = 67,358.91/338.30
  6. Step 6: Final answer
    x = 199.11

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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.