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Finding the Third Proportional to 491.25 and 1,275.38

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Solution

The third proportional to 491.25 and 1,275.38 is: 3,311.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    491.25 : 1,275.38 = 1,275.38 : x
  2. Step 2: Convert to fraction form
    491.25/1,275.38 = 1,275.38/x
  3. Step 3: Cross multiply
    491.25x = 1,275.38 × 1,275.38
  4. Step 4: Simplify right side
    491.25x = 1,626,581.39
  5. Step 5: Solve for x
    x = 1,626,581.39/491.25
  6. Step 6: Final answer
    x = 3,311.11

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Why These Related Problems?

These problems maintain the same ratio (2.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.