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Finding the Third Proportional to 1,387.25 and 3,005.25

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Solution

The third proportional to 1,387.25 and 3,005.25 is: 6,510.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387.25 : 3,005.25 = 3,005.25 : x
  2. Step 2: Convert to fraction form
    1,387.25/3,005.25 = 3,005.25/x
  3. Step 3: Cross multiply
    1,387.25x = 3,005.25 × 3,005.25
  4. Step 4: Simplify right side
    1,387.25x = 9,031,527.56
  5. Step 5: Solve for x
    x = 9,031,527.56/1,387.25
  6. Step 6: Final answer
    x = 6,510.38

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.