Home / 2,555.30-3,828.90-2,142.20

Finding the Fourth Proportional to 2,555.30, 3,828.90 and 2,142.20

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Solution

The fourth proportional to 2,555.30, 3,828.90 and 2,142.20 is: 3,209.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,555.30 : 3,828.90 = 2,142.20 : x
  2. Step 2: Convert to fraction form
    2,555.30/3,828.90 = 2,142.20/x
  3. Step 3: Cross multiply
    2,555.30x = 3,828.90 × 2,142.20
  4. Step 4: Simplify right side
    2,555.30x = 8,202,269.58
  5. Step 5: Solve for x
    x = 8,202,269.58/2,555.30
  6. Step 6: Final answer
    x = 3,209.90

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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.