Home / 2,571.85-3,853.72-1,988.28

Finding the Fourth Proportional to 2,571.85, 3,853.72 and 1,988.28

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Solution

The fourth proportional to 2,571.85, 3,853.72 and 1,988.28 is: 2,979.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,571.85 : 3,853.72 = 1,988.28 : x
  2. Step 2: Convert to fraction form
    2,571.85/3,853.72 = 1,988.28/x
  3. Step 3: Cross multiply
    2,571.85x = 3,853.72 × 1,988.28
  4. Step 4: Simplify right side
    2,571.85x = 7,662,279.68
  5. Step 5: Solve for x
    x = 7,662,279.68/2,571.85
  6. Step 6: Final answer
    x = 2,979.29

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1.5x scale

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.