Home / 1,939.11-2,676.52-1,142.90

Finding the Fourth Proportional to 1,939.11, 2,676.52 and 1,142.90

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Solution

The fourth proportional to 1,939.11, 2,676.52 and 1,142.90 is: 1,577.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.11 : 2,676.52 = 1,142.90 : x
  2. Step 2: Convert to fraction form
    1,939.11/2,676.52 = 1,142.90/x
  3. Step 3: Cross multiply
    1,939.11x = 2,676.52 × 1,142.90
  4. Step 4: Simplify right side
    1,939.11x = 3,058,990.63
  5. Step 5: Solve for x
    x = 3,058,990.63/1,939.11
  6. Step 6: Final answer
    x = 1,577.52

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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.