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Finding the Third Proportional to 357 and 486

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Solution

The third proportional to 357 and 486 is: 661.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    357 : 486 = 486 : x
  2. Step 2: Convert to fraction form
    357/486 = 486/x
  3. Step 3: Cross multiply
    357x = 486 × 486
  4. Step 4: Simplify right side
    357x = 236,196
  5. Step 5: Solve for x
    x = 236,196/357
  6. Step 6: Final answer
    x = 661.61

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.