Home / 2,855.38-3,939.32-1,792.70

Finding the Fourth Proportional to 2,855.38, 3,939.32 and 1,792.70

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Solution

The fourth proportional to 2,855.38, 3,939.32 and 1,792.70 is: 2,473.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,855.38 : 3,939.32 = 1,792.70 : x
  2. Step 2: Convert to fraction form
    2,855.38/3,939.32 = 1,792.70/x
  3. Step 3: Cross multiply
    2,855.38x = 3,939.32 × 1,792.70
  4. Step 4: Simplify right side
    2,855.38x = 7,061,990.30
  5. Step 5: Solve for x
    x = 7,061,990.30/2,855.38
  6. Step 6: Final answer
    x = 2,473.22

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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.