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Finding the Fourth Proportional to 615.52, 926.92 and 518.86

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Solution

The fourth proportional to 615.52, 926.92 and 518.86 is: 781.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.52 : 926.92 = 518.86 : x
  2. Step 2: Convert to fraction form
    615.52/926.92 = 518.86/x
  3. Step 3: Cross multiply
    615.52x = 926.92 × 518.86
  4. Step 4: Simplify right side
    615.52x = 480,941.71
  5. Step 5: Solve for x
    x = 480,941.71/615.52
  6. Step 6: Final answer
    x = 781.36

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.