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Finding the Third Proportional to 1,987.88 and 2,615.63

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Solution

The third proportional to 1,987.88 and 2,615.63 is: 3,441.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.88 : 2,615.63 = 2,615.63 : x
  2. Step 2: Convert to fraction form
    1,987.88/2,615.63 = 2,615.63/x
  3. Step 3: Cross multiply
    1,987.88x = 2,615.63 × 2,615.63
  4. Step 4: Simplify right side
    1,987.88x = 6,841,494.14
  5. Step 5: Solve for x
    x = 6,841,494.14/1,987.88
  6. Step 6: Final answer
    x = 3,441.61

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Why These Related Problems?

These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.