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Finding the Fourth Proportional to 6,378.78, 9,568.20 and 1,761.78

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Solution

The fourth proportional to 6,378.78, 9,568.20 and 1,761.78 is: 2,642.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,378.78 : 9,568.20 = 1,761.78 : x
  2. Step 2: Convert to fraction form
    6,378.78/9,568.20 = 1,761.78/x
  3. Step 3: Cross multiply
    6,378.78x = 9,568.20 × 1,761.78
  4. Step 4: Simplify right side
    6,378.78x = 16,857,063.40
  5. Step 5: Solve for x
    x = 16,857,063.40/6,378.78
  6. Step 6: Final answer
    x = 2,642.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.