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Finding the Third Proportional to 358.13 and 385.13

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Solution

The third proportional to 358.13 and 385.13 is: 414.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.13 : 385.13 = 385.13 : x
  2. Step 2: Convert to fraction form
    358.13/385.13 = 385.13/x
  3. Step 3: Cross multiply
    358.13x = 385.13 × 385.13
  4. Step 4: Simplify right side
    358.13x = 148,321.27
  5. Step 5: Solve for x
    x = 148,321.27/358.13
  6. Step 6: Final answer
    x = 414.16

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.