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Finding the Third Proportional to 3,867.75 and 4,390.88

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Solution

The third proportional to 3,867.75 and 4,390.88 is: 4,984.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,867.75 : 4,390.88 = 4,390.88 : x
  2. Step 2: Convert to fraction form
    3,867.75/4,390.88 = 4,390.88/x
  3. Step 3: Cross multiply
    3,867.75x = 4,390.88 × 4,390.88
  4. Step 4: Simplify right side
    3,867.75x = 19,279,783.27
  5. Step 5: Solve for x
    x = 19,279,783.27/3,867.75
  6. Step 6: Final answer
    x = 4,984.75

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Why These Related Problems?

These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.