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Finding the Third Proportional to 4,218.50 and 6,778

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Solution

The third proportional to 4,218.50 and 6,778 is: 10,890.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,218.50 : 6,778 = 6,778 : x
  2. Step 2: Convert to fraction form
    4,218.50/6,778 = 6,778/x
  3. Step 3: Cross multiply
    4,218.50x = 6,778 × 6,778
  4. Step 4: Simplify right side
    4,218.50x = 45,941,284
  5. Step 5: Solve for x
    x = 45,941,284/4,218.50
  6. Step 6: Final answer
    x = 10,890.43

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.