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Finding the Fourth Proportional to 576.99, 868.62 and 517.46

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Solution

The fourth proportional to 576.99, 868.62 and 517.46 is: 778.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.99 : 868.62 = 517.46 : x
  2. Step 2: Convert to fraction form
    576.99/868.62 = 517.46/x
  3. Step 3: Cross multiply
    576.99x = 868.62 × 517.46
  4. Step 4: Simplify right side
    576.99x = 449,471.76
  5. Step 5: Solve for x
    x = 449,471.76/576.99
  6. Step 6: Final answer
    x = 778.99

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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.