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Finding the Fourth Proportional to 479.43, 719.21 and 132.75

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Solution

The fourth proportional to 479.43, 719.21 and 132.75 is: 199.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.43 : 719.21 = 132.75 : x
  2. Step 2: Convert to fraction form
    479.43/719.21 = 132.75/x
  3. Step 3: Cross multiply
    479.43x = 719.21 × 132.75
  4. Step 4: Simplify right side
    479.43x = 95,474.46
  5. Step 5: Solve for x
    x = 95,474.46/479.43
  6. Step 6: Final answer
    x = 199.14

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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.