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Finding the Fourth Proportional to 515.45, 773.22 and 168.84

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Solution

The fourth proportional to 515.45, 773.22 and 168.84 is: 253.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.45 : 773.22 = 168.84 : x
  2. Step 2: Convert to fraction form
    515.45/773.22 = 168.84/x
  3. Step 3: Cross multiply
    515.45x = 773.22 × 168.84
  4. Step 4: Simplify right side
    515.45x = 130,550.46
  5. Step 5: Solve for x
    x = 130,550.46/515.45
  6. Step 6: Final answer
    x = 253.28

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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.