Home / 2,491.87-3,438.61-1,372.75

Finding the Fourth Proportional to 2,491.87, 3,438.61 and 1,372.75

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Solution

The fourth proportional to 2,491.87, 3,438.61 and 1,372.75 is: 1,894.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,491.87 : 3,438.61 = 1,372.75 : x
  2. Step 2: Convert to fraction form
    2,491.87/3,438.61 = 1,372.75/x
  3. Step 3: Cross multiply
    2,491.87x = 3,438.61 × 1,372.75
  4. Step 4: Simplify right side
    2,491.87x = 4,720,327.82
  5. Step 5: Solve for x
    x = 4,720,327.82/2,491.87
  6. Step 6: Final answer
    x = 1,894.29

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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.