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Finding the Fourth Proportional to 3,891.48, 5,372.44 and 2,698.20

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Solution

The fourth proportional to 3,891.48, 5,372.44 and 2,698.20 is: 3,725.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,891.48 : 5,372.44 = 2,698.20 : x
  2. Step 2: Convert to fraction form
    3,891.48/5,372.44 = 2,698.20/x
  3. Step 3: Cross multiply
    3,891.48x = 5,372.44 × 2,698.20
  4. Step 4: Simplify right side
    3,891.48x = 14,495,917.61
  5. Step 5: Solve for x
    x = 14,495,917.61/3,891.48
  6. Step 6: Final answer
    x = 3,725.04

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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.