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Finding the Third Proportional to 387.75 and 474

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Solution

The third proportional to 387.75 and 474 is: 579.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.75 : 474 = 474 : x
  2. Step 2: Convert to fraction form
    387.75/474 = 474/x
  3. Step 3: Cross multiply
    387.75x = 474 × 474
  4. Step 4: Simplify right side
    387.75x = 224,676
  5. Step 5: Solve for x
    x = 224,676/387.75
  6. Step 6: Final answer
    x = 579.44

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Why These Related Problems?

These problems maintain the same ratio (1.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.