Home / 3,965.12-5,947.60-1,191.80

Finding the Fourth Proportional to 3,965.12, 5,947.60 and 1,191.80

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Solution

The fourth proportional to 3,965.12, 5,947.60 and 1,191.80 is: 1,787.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,965.12 : 5,947.60 = 1,191.80 : x
  2. Step 2: Convert to fraction form
    3,965.12/5,947.60 = 1,191.80/x
  3. Step 3: Cross multiply
    3,965.12x = 5,947.60 × 1,191.80
  4. Step 4: Simplify right side
    3,965.12x = 7,088,349.68
  5. Step 5: Solve for x
    x = 7,088,349.68/3,965.12
  6. Step 6: Final answer
    x = 1,787.68

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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.