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Finding the Fourth Proportional to 3,887.61, 5,828.22 and 1,808.91

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Solution

The fourth proportional to 3,887.61, 5,828.22 and 1,808.91 is: 2,711.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,887.61 : 5,828.22 = 1,808.91 : x
  2. Step 2: Convert to fraction form
    3,887.61/5,828.22 = 1,808.91/x
  3. Step 3: Cross multiply
    3,887.61x = 5,828.22 × 1,808.91
  4. Step 4: Simplify right side
    3,887.61x = 10,542,725.44
  5. Step 5: Solve for x
    x = 10,542,725.44/3,887.61
  6. Step 6: Final answer
    x = 2,711.88

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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.