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Finding the Third Proportional to 1,615.78 and 3,489.47

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Solution

The third proportional to 1,615.78 and 3,489.47 is: 7,535.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,615.78 : 3,489.47 = 3,489.47 : x
  2. Step 2: Convert to fraction form
    1,615.78/3,489.47 = 3,489.47/x
  3. Step 3: Cross multiply
    1,615.78x = 3,489.47 × 3,489.47
  4. Step 4: Simplify right side
    1,615.78x = 12,176,392.16
  5. Step 5: Solve for x
    x = 12,176,392.16/1,615.78
  6. Step 6: Final answer
    x = 7,535.92

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.