Home / 2,145.94-2,961.20-1,201.68

Finding the Fourth Proportional to 2,145.94, 2,961.20 and 1,201.68

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Solution

The fourth proportional to 2,145.94, 2,961.20 and 1,201.68 is: 1,658.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.94 : 2,961.20 = 1,201.68 : x
  2. Step 2: Convert to fraction form
    2,145.94/2,961.20 = 1,201.68/x
  3. Step 3: Cross multiply
    2,145.94x = 2,961.20 × 1,201.68
  4. Step 4: Simplify right side
    2,145.94x = 3,558,414.82
  5. Step 5: Solve for x
    x = 3,558,414.82/2,145.94
  6. Step 6: Final answer
    x = 1,658.21

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1.5x scale

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.