Home / 1,938.94-2,676.65-1,240.72

Finding the Fourth Proportional to 1,938.94, 2,676.65 and 1,240.72

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Solution

The fourth proportional to 1,938.94, 2,676.65 and 1,240.72 is: 1,712.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.94 : 2,676.65 = 1,240.72 : x
  2. Step 2: Convert to fraction form
    1,938.94/2,676.65 = 1,240.72/x
  3. Step 3: Cross multiply
    1,938.94x = 2,676.65 × 1,240.72
  4. Step 4: Simplify right side
    1,938.94x = 3,320,959.80
  5. Step 5: Solve for x
    x = 3,320,959.80/1,938.94
  6. Step 6: Final answer
    x = 1,712.78

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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.