Home / 1,321.92-1,992.60-1,251.36

Finding the Fourth Proportional to 1,321.92, 1,992.60 and 1,251.36

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Solution

The fourth proportional to 1,321.92, 1,992.60 and 1,251.36 is: 1,886.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321.92 : 1,992.60 = 1,251.36 : x
  2. Step 2: Convert to fraction form
    1,321.92/1,992.60 = 1,251.36/x
  3. Step 3: Cross multiply
    1,321.92x = 1,992.60 × 1,251.36
  4. Step 4: Simplify right side
    1,321.92x = 2,493,459.94
  5. Step 5: Solve for x
    x = 2,493,459.94/1,321.92
  6. Step 6: Final answer
    x = 1,886.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.