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Finding the Third Proportional to 355.78 and 403.03

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Solution

The third proportional to 355.78 and 403.03 is: 456.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.78 : 403.03 = 403.03 : x
  2. Step 2: Convert to fraction form
    355.78/403.03 = 403.03/x
  3. Step 3: Cross multiply
    355.78x = 403.03 × 403.03
  4. Step 4: Simplify right side
    355.78x = 162,434.19
  5. Step 5: Solve for x
    x = 162,434.19/355.78
  6. Step 6: Final answer
    x = 456.56

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Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.