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Finding the Fourth Proportional to 514.80, 772.21 and 168.14

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Solution

The fourth proportional to 514.80, 772.21 and 168.14 is: 252.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    514.80 : 772.21 = 168.14 : x
  2. Step 2: Convert to fraction form
    514.80/772.21 = 168.14/x
  3. Step 3: Cross multiply
    514.80x = 772.21 × 168.14
  4. Step 4: Simplify right side
    514.80x = 129,835.53
  5. Step 5: Solve for x
    x = 129,835.53/514.80
  6. Step 6: Final answer
    x = 252.21

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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.