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Finding the Third Proportional to 253.13 and 415.13

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Solution

The third proportional to 253.13 and 415.13 is: 680.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    253.13 : 415.13 = 415.13 : x
  2. Step 2: Convert to fraction form
    253.13/415.13 = 415.13/x
  3. Step 3: Cross multiply
    253.13x = 415.13 × 415.13
  4. Step 4: Simplify right side
    253.13x = 172,328.77
  5. Step 5: Solve for x
    x = 172,328.77/253.13
  6. Step 6: Final answer
    x = 680.81

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Why These Related Problems?

These problems maintain the same ratio (1.64) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.