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Finding the Third Proportional to 424.50 and 876.28

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Solution

The third proportional to 424.50 and 876.28 is: 1,808.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.50 : 876.28 = 876.28 : x
  2. Step 2: Convert to fraction form
    424.50/876.28 = 876.28/x
  3. Step 3: Cross multiply
    424.50x = 876.28 × 876.28
  4. Step 4: Simplify right side
    424.50x = 767,868.83
  5. Step 5: Solve for x
    x = 767,868.83/424.50
  6. Step 6: Final answer
    x = 1,808.88

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.