Home / 2,830.80-4,248.90-2,215.20

Finding the Fourth Proportional to 2,830.80, 4,248.90 and 2,215.20

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Solution

The fourth proportional to 2,830.80, 4,248.90 and 2,215.20 is: 3,324.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,830.80 : 4,248.90 = 2,215.20 : x
  2. Step 2: Convert to fraction form
    2,830.80/4,248.90 = 2,215.20/x
  3. Step 3: Cross multiply
    2,830.80x = 4,248.90 × 2,215.20
  4. Step 4: Simplify right side
    2,830.80x = 9,412,163.28
  5. Step 5: Solve for x
    x = 9,412,163.28/2,830.80
  6. Step 6: Final answer
    x = 3,324.91

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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.