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Finding the Fourth Proportional to 2,847.94, 4,269 and 1,808.70

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Solution

The fourth proportional to 2,847.94, 4,269 and 1,808.70 is: 2,711.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,847.94 : 4,269 = 1,808.70 : x
  2. Step 2: Convert to fraction form
    2,847.94/4,269 = 1,808.70/x
  3. Step 3: Cross multiply
    2,847.94x = 4,269 × 1,808.70
  4. Step 4: Simplify right side
    2,847.94x = 7,721,340.30
  5. Step 5: Solve for x
    x = 7,721,340.30/2,847.94
  6. Step 6: Final answer
    x = 2,711.20

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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.