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Finding the Third Proportional to 520.31 and 576.84

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Solution

The third proportional to 520.31 and 576.84 is: 639.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    520.31 : 576.84 = 576.84 : x
  2. Step 2: Convert to fraction form
    520.31/576.84 = 576.84/x
  3. Step 3: Cross multiply
    520.31x = 576.84 × 576.84
  4. Step 4: Simplify right side
    520.31x = 332,748.71
  5. Step 5: Solve for x
    x = 332,748.71/520.31
  6. Step 6: Final answer
    x = 639.52

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Why These Related Problems?

These problems maintain the same ratio (1.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.