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Finding the Third Proportional to 269.13 and 438.69

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Solution

The third proportional to 269.13 and 438.69 is: 715.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    269.13 : 438.69 = 438.69 : x
  2. Step 2: Convert to fraction form
    269.13/438.69 = 438.69/x
  3. Step 3: Cross multiply
    269.13x = 438.69 × 438.69
  4. Step 4: Simplify right side
    269.13x = 192,446.72
  5. Step 5: Solve for x
    x = 192,446.72/269.13
  6. Step 6: Final answer
    x = 715.08

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Why These Related Problems?

These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.