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Finding the Fourth Proportional to 6,440.96, 8,888.56 and 3,789.20

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Solution

The fourth proportional to 6,440.96, 8,888.56 and 3,789.20 is: 5,229.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,440.96 : 8,888.56 = 3,789.20 : x
  2. Step 2: Convert to fraction form
    6,440.96/8,888.56 = 3,789.20/x
  3. Step 3: Cross multiply
    6,440.96x = 8,888.56 × 3,789.20
  4. Step 4: Simplify right side
    6,440.96x = 33,680,531.55
  5. Step 5: Solve for x
    x = 33,680,531.55/6,440.96
  6. Step 6: Final answer
    x = 5,229.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.