Home / 2,491.88-3,438.68-1,372.76

Finding the Fourth Proportional to 2,491.88, 3,438.68 and 1,372.76

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Solution

The fourth proportional to 2,491.88, 3,438.68 and 1,372.76 is: 1,894.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,491.88 : 3,438.68 = 1,372.76 : x
  2. Step 2: Convert to fraction form
    2,491.88/3,438.68 = 1,372.76/x
  3. Step 3: Cross multiply
    2,491.88x = 3,438.68 × 1,372.76
  4. Step 4: Simplify right side
    2,491.88x = 4,720,487.52
  5. Step 5: Solve for x
    x = 4,720,487.52/2,491.88
  6. Step 6: Final answer
    x = 1,894.35

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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.