Home / 2,453.28-3,385.11-1,390.83

Finding the Fourth Proportional to 2,453.28, 3,385.11 and 1,390.83

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Solution

The fourth proportional to 2,453.28, 3,385.11 and 1,390.83 is: 1,919.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,453.28 : 3,385.11 = 1,390.83 : x
  2. Step 2: Convert to fraction form
    2,453.28/3,385.11 = 1,390.83/x
  3. Step 3: Cross multiply
    2,453.28x = 3,385.11 × 1,390.83
  4. Step 4: Simplify right side
    2,453.28x = 4,708,112.54
  5. Step 5: Solve for x
    x = 4,708,112.54/2,453.28
  6. Step 6: Final answer
    x = 1,919.11

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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.