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Finding the Third Proportional to 559.50 and 616.88

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Solution

The third proportional to 559.50 and 616.88 is: 680.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.50 : 616.88 = 616.88 : x
  2. Step 2: Convert to fraction form
    559.50/616.88 = 616.88/x
  3. Step 3: Cross multiply
    559.50x = 616.88 × 616.88
  4. Step 4: Simplify right side
    559.50x = 380,534.77
  5. Step 5: Solve for x
    x = 380,534.77/559.50
  6. Step 6: Final answer
    x = 680.13

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Why These Related Problems?

These problems maintain the same ratio (1.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.