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Finding the Third Proportional to 268.24 and 415.13

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Solution

The third proportional to 268.24 and 415.13 is: 642.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    268.24 : 415.13 = 415.13 : x
  2. Step 2: Convert to fraction form
    268.24/415.13 = 415.13/x
  3. Step 3: Cross multiply
    268.24x = 415.13 × 415.13
  4. Step 4: Simplify right side
    268.24x = 172,328.77
  5. Step 5: Solve for x
    x = 172,328.77/268.24
  6. Step 6: Final answer
    x = 642.44

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.