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Finding the Fourth Proportional to 517.98, 776.97 and 355.17

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Solution

The fourth proportional to 517.98, 776.97 and 355.17 is: 532.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    517.98 : 776.97 = 355.17 : x
  2. Step 2: Convert to fraction form
    517.98/776.97 = 355.17/x
  3. Step 3: Cross multiply
    517.98x = 776.97 × 355.17
  4. Step 4: Simplify right side
    517.98x = 275,956.43
  5. Step 5: Solve for x
    x = 275,956.43/517.98
  6. Step 6: Final answer
    x = 532.76

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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.