Home / 1,581.50-2,179.36-1,138.57

Finding the Fourth Proportional to 1,581.50, 2,179.36 and 1,138.57

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Solution

The fourth proportional to 1,581.50, 2,179.36 and 1,138.57 is: 1,568.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581.50 : 2,179.36 = 1,138.57 : x
  2. Step 2: Convert to fraction form
    1,581.50/2,179.36 = 1,138.57/x
  3. Step 3: Cross multiply
    1,581.50x = 2,179.36 × 1,138.57
  4. Step 4: Simplify right side
    1,581.50x = 2,481,353.92
  5. Step 5: Solve for x
    x = 2,481,353.92/1,581.50
  6. Step 6: Final answer
    x = 1,568.99

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.