Home / 3,947.30-5,921.20-1,314.70

Finding the Fourth Proportional to 3,947.30, 5,921.20 and 1,314.70

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Solution

The fourth proportional to 3,947.30, 5,921.20 and 1,314.70 is: 1,972.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.30 : 5,921.20 = 1,314.70 : x
  2. Step 2: Convert to fraction form
    3,947.30/5,921.20 = 1,314.70/x
  3. Step 3: Cross multiply
    3,947.30x = 5,921.20 × 1,314.70
  4. Step 4: Simplify right side
    3,947.30x = 7,784,588.48
  5. Step 5: Solve for x
    x = 7,784,588.48/3,947.30
  6. Step 6: Final answer
    x = 1,972.13

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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.