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Finding the Fourth Proportional to 3,439.77, 4,747.05 and 1,947.75

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Solution

The fourth proportional to 3,439.77, 4,747.05 and 1,947.75 is: 2,687.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,439.77 : 4,747.05 = 1,947.75 : x
  2. Step 2: Convert to fraction form
    3,439.77/4,747.05 = 1,947.75/x
  3. Step 3: Cross multiply
    3,439.77x = 4,747.05 × 1,947.75
  4. Step 4: Simplify right side
    3,439.77x = 9,246,066.64
  5. Step 5: Solve for x
    x = 9,246,066.64/3,439.77
  6. Step 6: Final answer
    x = 2,687.99

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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.