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Finding the Third Proportional to 286.88 and 315

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Solution

The third proportional to 286.88 and 315 is: 345.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.88 : 315 = 315 : x
  2. Step 2: Convert to fraction form
    286.88/315 = 315/x
  3. Step 3: Cross multiply
    286.88x = 315 × 315
  4. Step 4: Simplify right side
    286.88x = 99,225
  5. Step 5: Solve for x
    x = 99,225/286.88
  6. Step 6: Final answer
    x = 345.88

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Why These Related Problems?

These problems maintain the same ratio (1.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.