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Finding the Fourth Proportional to 515.90, 773.77 and 169.25

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Solution

The fourth proportional to 515.90, 773.77 and 169.25 is: 253.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.90 : 773.77 = 169.25 : x
  2. Step 2: Convert to fraction form
    515.90/773.77 = 169.25/x
  3. Step 3: Cross multiply
    515.90x = 773.77 × 169.25
  4. Step 4: Simplify right side
    515.90x = 130,956.92
  5. Step 5: Solve for x
    x = 130,956.92/515.90
  6. Step 6: Final answer
    x = 253.84

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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.