Home / 2,491.85-3,438.74-1,372.76

Finding the Fourth Proportional to 2,491.85, 3,438.74 and 1,372.76

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Solution

The fourth proportional to 2,491.85, 3,438.74 and 1,372.76 is: 1,894.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,491.85 : 3,438.74 = 1,372.76 : x
  2. Step 2: Convert to fraction form
    2,491.85/3,438.74 = 1,372.76/x
  3. Step 3: Cross multiply
    2,491.85x = 3,438.74 × 1,372.76
  4. Step 4: Simplify right side
    2,491.85x = 4,720,564.72
  5. Step 5: Solve for x
    x = 4,720,564.72/2,491.85
  6. Step 6: Final answer
    x = 1,894.40

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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.