Home / 1,639.28-2,260.68-1,265.70

Finding the Fourth Proportional to 1,639.28, 2,260.68 and 1,265.70

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Solution

The fourth proportional to 1,639.28, 2,260.68 and 1,265.70 is: 1,745.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.28 : 2,260.68 = 1,265.70 : x
  2. Step 2: Convert to fraction form
    1,639.28/2,260.68 = 1,265.70/x
  3. Step 3: Cross multiply
    1,639.28x = 2,260.68 × 1,265.70
  4. Step 4: Simplify right side
    1,639.28x = 2,861,342.68
  5. Step 5: Solve for x
    x = 2,861,342.68/1,639.28
  6. Step 6: Final answer
    x = 1,745.49

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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.