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Finding the Third Proportional to 291.38 and 454.69

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Solution

The third proportional to 291.38 and 454.69 is: 709.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    291.38 : 454.69 = 454.69 : x
  2. Step 2: Convert to fraction form
    291.38/454.69 = 454.69/x
  3. Step 3: Cross multiply
    291.38x = 454.69 × 454.69
  4. Step 4: Simplify right side
    291.38x = 206,740.72
  5. Step 5: Solve for x
    x = 206,740.72/291.38
  6. Step 6: Final answer
    x = 709.53

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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.