Home / 2,428.80-3,351.44-1,380.88

Finding the Fourth Proportional to 2,428.80, 3,351.44 and 1,380.88

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Solution

The fourth proportional to 2,428.80, 3,351.44 and 1,380.88 is: 1,905.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,428.80 : 3,351.44 = 1,380.88 : x
  2. Step 2: Convert to fraction form
    2,428.80/3,351.44 = 1,380.88/x
  3. Step 3: Cross multiply
    2,428.80x = 3,351.44 × 1,380.88
  4. Step 4: Simplify right side
    2,428.80x = 4,627,936.47
  5. Step 5: Solve for x
    x = 4,627,936.47/2,428.80
  6. Step 6: Final answer
    x = 1,905.44

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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.