Home / 2,980.80-4,112.64-2,197.44

Finding the Fourth Proportional to 2,980.80, 4,112.64 and 2,197.44

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Solution

The fourth proportional to 2,980.80, 4,112.64 and 2,197.44 is: 3,031.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,980.80 : 4,112.64 = 2,197.44 : x
  2. Step 2: Convert to fraction form
    2,980.80/4,112.64 = 2,197.44/x
  3. Step 3: Cross multiply
    2,980.80x = 4,112.64 × 2,197.44
  4. Step 4: Simplify right side
    2,980.80x = 9,037,279.64
  5. Step 5: Solve for x
    x = 9,037,279.64/2,980.80
  6. Step 6: Final answer
    x = 3,031.83

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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.