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Finding the Fourth Proportional to 515.42, 773.25 and 255.57

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Solution

The fourth proportional to 515.42, 773.25 and 255.57 is: 383.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.42 : 773.25 = 255.57 : x
  2. Step 2: Convert to fraction form
    515.42/773.25 = 255.57/x
  3. Step 3: Cross multiply
    515.42x = 773.25 × 255.57
  4. Step 4: Simplify right side
    515.42x = 197,616.60
  5. Step 5: Solve for x
    x = 197,616.60/515.42
  6. Step 6: Final answer
    x = 383.41

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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.