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Finding the Fourth Proportional to 3,899.76, 5,382.95 and 3,104.55

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Solution

The fourth proportional to 3,899.76, 5,382.95 and 3,104.55 is: 4,285.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,899.76 : 5,382.95 = 3,104.55 : x
  2. Step 2: Convert to fraction form
    3,899.76/5,382.95 = 3,104.55/x
  3. Step 3: Cross multiply
    3,899.76x = 5,382.95 × 3,104.55
  4. Step 4: Simplify right side
    3,899.76x = 16,711,621.90
  5. Step 5: Solve for x
    x = 16,711,621.90/3,899.76
  6. Step 6: Final answer
    x = 4,285.29

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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.