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Finding the Fourth Proportional to 576.73, 860.66 and 515.22

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Solution

The fourth proportional to 576.73, 860.66 and 515.22 is: 768.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.73 : 860.66 = 515.22 : x
  2. Step 2: Convert to fraction form
    576.73/860.66 = 515.22/x
  3. Step 3: Cross multiply
    576.73x = 860.66 × 515.22
  4. Step 4: Simplify right side
    576.73x = 443,429.25
  5. Step 5: Solve for x
    x = 443,429.25/576.73
  6. Step 6: Final answer
    x = 768.87

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.