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Finding the Third Proportional to 393 and 559

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Solution

The third proportional to 393 and 559 is: 795.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    393 : 559 = 559 : x
  2. Step 2: Convert to fraction form
    393/559 = 559/x
  3. Step 3: Cross multiply
    393x = 559 × 559
  4. Step 4: Simplify right side
    393x = 312,481
  5. Step 5: Solve for x
    x = 312,481/393
  6. Step 6: Final answer
    x = 795.12

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.