Home / 2,453.18-3,679.86-721.81

Finding the Fourth Proportional to 2,453.18, 3,679.86 and 721.81

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Solution

The fourth proportional to 2,453.18, 3,679.86 and 721.81 is: 1,082.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,453.18 : 3,679.86 = 721.81 : x
  2. Step 2: Convert to fraction form
    2,453.18/3,679.86 = 721.81/x
  3. Step 3: Cross multiply
    2,453.18x = 3,679.86 × 721.81
  4. Step 4: Simplify right side
    2,453.18x = 2,656,159.75
  5. Step 5: Solve for x
    x = 2,656,159.75/2,453.18
  6. Step 6: Final answer
    x = 1,082.74

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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.