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Finding the Fourth Proportional to 582.79, 871.56 and 518.17

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Solution

The fourth proportional to 582.79, 871.56 and 518.17 is: 774.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    582.79 : 871.56 = 518.17 : x
  2. Step 2: Convert to fraction form
    582.79/871.56 = 518.17/x
  3. Step 3: Cross multiply
    582.79x = 871.56 × 518.17
  4. Step 4: Simplify right side
    582.79x = 451,616.25
  5. Step 5: Solve for x
    x = 451,616.25/582.79
  6. Step 6: Final answer
    x = 774.92

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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.