Home / 1,961.92-2,938.74-1,342.72

Finding the Fourth Proportional to 1,961.92, 2,938.74 and 1,342.72

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Solution

The fourth proportional to 1,961.92, 2,938.74 and 1,342.72 is: 2,011.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,961.92 : 2,938.74 = 1,342.72 : x
  2. Step 2: Convert to fraction form
    1,961.92/2,938.74 = 1,342.72/x
  3. Step 3: Cross multiply
    1,961.92x = 2,938.74 × 1,342.72
  4. Step 4: Simplify right side
    1,961.92x = 3,945,904.97
  5. Step 5: Solve for x
    x = 3,945,904.97/1,961.92
  6. Step 6: Final answer
    x = 2,011.25

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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.