Home / 1,639.11-2,454.99-1,272.79

Finding the Fourth Proportional to 1,639.11, 2,454.99 and 1,272.79

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Solution

The fourth proportional to 1,639.11, 2,454.99 and 1,272.79 is: 1,906.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,639.11 : 2,454.99 = 1,272.79 : x
  2. Step 2: Convert to fraction form
    1,639.11/2,454.99 = 1,272.79/x
  3. Step 3: Cross multiply
    1,639.11x = 2,454.99 × 1,272.79
  4. Step 4: Simplify right side
    1,639.11x = 3,124,686.72
  5. Step 5: Solve for x
    x = 3,124,686.72/1,639.11
  6. Step 6: Final answer
    x = 1,906.33

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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.