Home / 1,939.72-2,677.44-1,442.20

Finding the Fourth Proportional to 1,939.72, 2,677.44 and 1,442.20

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Solution

The fourth proportional to 1,939.72, 2,677.44 and 1,442.20 is: 1,990.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.72 : 2,677.44 = 1,442.20 : x
  2. Step 2: Convert to fraction form
    1,939.72/2,677.44 = 1,442.20/x
  3. Step 3: Cross multiply
    1,939.72x = 2,677.44 × 1,442.20
  4. Step 4: Simplify right side
    1,939.72x = 3,861,403.97
  5. Step 5: Solve for x
    x = 3,861,403.97/1,939.72
  6. Step 6: Final answer
    x = 1,990.70

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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.