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Finding the Third Proportional to 423.98 and 649.48

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Solution

The third proportional to 423.98 and 649.48 is: 994.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.98 : 649.48 = 649.48 : x
  2. Step 2: Convert to fraction form
    423.98/649.48 = 649.48/x
  3. Step 3: Cross multiply
    423.98x = 649.48 × 649.48
  4. Step 4: Simplify right side
    423.98x = 421,819.81
  5. Step 5: Solve for x
    x = 421,819.81/423.98
  6. Step 6: Final answer
    x = 994.89

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.