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Finding the Third Proportional to 418.50 and 714.75

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Solution

The third proportional to 418.50 and 714.75 is: 1,220.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.50 : 714.75 = 714.75 : x
  2. Step 2: Convert to fraction form
    418.50/714.75 = 714.75/x
  3. Step 3: Cross multiply
    418.50x = 714.75 × 714.75
  4. Step 4: Simplify right side
    418.50x = 510,867.56
  5. Step 5: Solve for x
    x = 510,867.56/418.50
  6. Step 6: Final answer
    x = 1,220.71

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Why These Related Problems?

These problems maintain the same ratio (1.71) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.