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Finding the Fourth Proportional to 636.72, 955.92 and 516

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Solution

The fourth proportional to 636.72, 955.92 and 516 is: 774.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    636.72 : 955.92 = 516 : x
  2. Step 2: Convert to fraction form
    636.72/955.92 = 516/x
  3. Step 3: Cross multiply
    636.72x = 955.92 × 516
  4. Step 4: Simplify right side
    636.72x = 493,254.72
  5. Step 5: Solve for x
    x = 493,254.72/636.72
  6. Step 6: Final answer
    x = 774.68

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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.