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Finding the Third Proportional to 518.50 and 824.25

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Solution

The third proportional to 518.50 and 824.25 is: 1,310.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.50 : 824.25 = 824.25 : x
  2. Step 2: Convert to fraction form
    518.50/824.25 = 824.25/x
  3. Step 3: Cross multiply
    518.50x = 824.25 × 824.25
  4. Step 4: Simplify right side
    518.50x = 679,388.06
  5. Step 5: Solve for x
    x = 679,388.06/518.50
  6. Step 6: Final answer
    x = 1,310.30

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Why These Related Problems?

These problems maintain the same ratio (1.59) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.