Home / 2,267.80-3,129.68-1,428.20

Finding the Fourth Proportional to 2,267.80, 3,129.68 and 1,428.20

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Solution

The fourth proportional to 2,267.80, 3,129.68 and 1,428.20 is: 1,970.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,267.80 : 3,129.68 = 1,428.20 : x
  2. Step 2: Convert to fraction form
    2,267.80/3,129.68 = 1,428.20/x
  3. Step 3: Cross multiply
    2,267.80x = 3,129.68 × 1,428.20
  4. Step 4: Simplify right side
    2,267.80x = 4,469,808.98
  5. Step 5: Solve for x
    x = 4,469,808.98/2,267.80
  6. Step 6: Final answer
    x = 1,970.99

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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.