Home / 3,947.20-5,920.24-1,349.76

Finding the Fourth Proportional to 3,947.20, 5,920.24 and 1,349.76

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Solution

The fourth proportional to 3,947.20, 5,920.24 and 1,349.76 is: 2,024.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,947.20 : 5,920.24 = 1,349.76 : x
  2. Step 2: Convert to fraction form
    3,947.20/5,920.24 = 1,349.76/x
  3. Step 3: Cross multiply
    3,947.20x = 5,920.24 × 1,349.76
  4. Step 4: Simplify right side
    3,947.20x = 7,990,903.14
  5. Step 5: Solve for x
    x = 7,990,903.14/3,947.20
  6. Step 6: Final answer
    x = 2,024.45

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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.