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Finding the Third Proportional to 393.50 and 928.25

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Solution

The third proportional to 393.50 and 928.25 is: 2,189.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.50 : 928.25 = 928.25 : x
  2. Step 2: Convert to fraction form
    393.50/928.25 = 928.25/x
  3. Step 3: Cross multiply
    393.50x = 928.25 × 928.25
  4. Step 4: Simplify right side
    393.50x = 861,648.06
  5. Step 5: Solve for x
    x = 861,648.06/393.50
  6. Step 6: Final answer
    x = 2,189.70

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Why These Related Problems?

These problems maintain the same ratio (2.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.