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Finding the Fourth Proportional to 517.90, 775.32 and 344.38

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Solution

The fourth proportional to 517.90, 775.32 and 344.38 is: 515.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.90 : 775.32 = 344.38 : x
  2. Step 2: Convert to fraction form
    517.90/775.32 = 344.38/x
  3. Step 3: Cross multiply
    517.90x = 775.32 × 344.38
  4. Step 4: Simplify right side
    517.90x = 267,004.70
  5. Step 5: Solve for x
    x = 267,004.70/517.90
  6. Step 6: Final answer
    x = 515.55

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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.