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Finding the Third Proportional to 4,780 and 6,386

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Solution

The third proportional to 4,780 and 6,386 is: 8,531.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,780 : 6,386 = 6,386 : x
  2. Step 2: Convert to fraction form
    4,780/6,386 = 6,386/x
  3. Step 3: Cross multiply
    4,780x = 6,386 × 6,386
  4. Step 4: Simplify right side
    4,780x = 40,780,996
  5. Step 5: Solve for x
    x = 40,780,996/4,780
  6. Step 6: Final answer
    x = 8,531.59

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.