Home / 3,072.80-4,248.36-2,679.20

Finding the Fourth Proportional to 3,072.80, 4,248.36 and 2,679.20

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Solution

The fourth proportional to 3,072.80, 4,248.36 and 2,679.20 is: 3,704.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,072.80 : 4,248.36 = 2,679.20 : x
  2. Step 2: Convert to fraction form
    3,072.80/4,248.36 = 2,679.20/x
  3. Step 3: Cross multiply
    3,072.80x = 4,248.36 × 2,679.20
  4. Step 4: Simplify right side
    3,072.80x = 11,382,206.11
  5. Step 5: Solve for x
    x = 11,382,206.11/3,072.80
  6. Step 6: Final answer
    x = 3,704.18

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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.