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Finding the Third Proportional to 358.75 and 556.38

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Solution

The third proportional to 358.75 and 556.38 is: 862.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.75 : 556.38 = 556.38 : x
  2. Step 2: Convert to fraction form
    358.75/556.38 = 556.38/x
  3. Step 3: Cross multiply
    358.75x = 556.38 × 556.38
  4. Step 4: Simplify right side
    358.75x = 309,553.14
  5. Step 5: Solve for x
    x = 309,553.14/358.75
  6. Step 6: Final answer
    x = 862.87

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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.