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Finding the Third Proportional to 386 and 724

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Solution

The third proportional to 386 and 724 is: 1,357.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    386 : 724 = 724 : x
  2. Step 2: Convert to fraction form
    386/724 = 724/x
  3. Step 3: Cross multiply
    386x = 724 × 724
  4. Step 4: Simplify right side
    386x = 524,176
  5. Step 5: Solve for x
    x = 524,176/386
  6. Step 6: Final answer
    x = 1,357.97

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Why These Related Problems?

These problems maintain the same ratio (1.88) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.