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Finding the Fourth Proportional to 515.47, 773.19 and 168.79

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Solution

The fourth proportional to 515.47, 773.19 and 168.79 is: 253.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.47 : 773.19 = 168.79 : x
  2. Step 2: Convert to fraction form
    515.47/773.19 = 168.79/x
  3. Step 3: Cross multiply
    515.47x = 773.19 × 168.79
  4. Step 4: Simplify right side
    515.47x = 130,506.74
  5. Step 5: Solve for x
    x = 130,506.74/515.47
  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.