Home / 2,139.74-3,200.36-1,260.16

Finding the Fourth Proportional to 2,139.74, 3,200.36 and 1,260.16

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Solution

The fourth proportional to 2,139.74, 3,200.36 and 1,260.16 is: 1,884.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,139.74 : 3,200.36 = 1,260.16 : x
  2. Step 2: Convert to fraction form
    2,139.74/3,200.36 = 1,260.16/x
  3. Step 3: Cross multiply
    2,139.74x = 3,200.36 × 1,260.16
  4. Step 4: Simplify right side
    2,139.74x = 4,032,965.66
  5. Step 5: Solve for x
    x = 4,032,965.66/2,139.74
  6. Step 6: Final answer
    x = 1,884.79

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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.