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Finding the Third Proportional to 439.50 and 683.63

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Solution

The third proportional to 439.50 and 683.63 is: 1,063.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.50 : 683.63 = 683.63 : x
  2. Step 2: Convert to fraction form
    439.50/683.63 = 683.63/x
  3. Step 3: Cross multiply
    439.50x = 683.63 × 683.63
  4. Step 4: Simplify right side
    439.50x = 467,343.14
  5. Step 5: Solve for x
    x = 467,343.14/439.50
  6. Step 6: Final answer
    x = 1,063.35

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.