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Finding the Fourth Proportional to 515.49, 773.14 and 168.81

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Solution

The fourth proportional to 515.49, 773.14 and 168.81 is: 253.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.49 : 773.14 = 168.81 : x
  2. Step 2: Convert to fraction form
    515.49/773.14 = 168.81/x
  3. Step 3: Cross multiply
    515.49x = 773.14 × 168.81
  4. Step 4: Simplify right side
    515.49x = 130,513.76
  5. Step 5: Solve for x
    x = 130,513.76/515.49
  6. Step 6: Final answer
    x = 253.19

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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.