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Finding the Third Proportional to 4,920.75 and 5,649.75

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Solution

The third proportional to 4,920.75 and 5,649.75 is: 6,486.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,920.75 : 5,649.75 = 5,649.75 : x
  2. Step 2: Convert to fraction form
    4,920.75/5,649.75 = 5,649.75/x
  3. Step 3: Cross multiply
    4,920.75x = 5,649.75 × 5,649.75
  4. Step 4: Simplify right side
    4,920.75x = 31,919,675.06
  5. Step 5: Solve for x
    x = 31,919,675.06/4,920.75
  6. Step 6: Final answer
    x = 6,486.75

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.