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Finding the Third Proportional to 485 and 791

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Solution

The third proportional to 485 and 791 is: 1,290.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    485 : 791 = 791 : x
  2. Step 2: Convert to fraction form
    485/791 = 791/x
  3. Step 3: Cross multiply
    485x = 791 × 791
  4. Step 4: Simplify right side
    485x = 625,681
  5. Step 5: Solve for x
    x = 625,681/485
  6. Step 6: Final answer
    x = 1,290.06

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Why These Related Problems?

These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.