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Finding the Fourth Proportional to 515.60, 773.11 and 168.85

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Solution

The fourth proportional to 515.60, 773.11 and 168.85 is: 253.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.60 : 773.11 = 168.85 : x
  2. Step 2: Convert to fraction form
    515.60/773.11 = 168.85/x
  3. Step 3: Cross multiply
    515.60x = 773.11 × 168.85
  4. Step 4: Simplify right side
    515.60x = 130,540.80
  5. Step 5: Solve for x
    x = 130,540.80/515.60
  6. Step 6: Final answer
    x = 253.18

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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.