Home / 2,122.20-2,928.56-1,282.95

Finding the Fourth Proportional to 2,122.20, 2,928.56 and 1,282.95

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Solution

The fourth proportional to 2,122.20, 2,928.56 and 1,282.95 is: 1,770.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.20 : 2,928.56 = 1,282.95 : x
  2. Step 2: Convert to fraction form
    2,122.20/2,928.56 = 1,282.95/x
  3. Step 3: Cross multiply
    2,122.20x = 2,928.56 × 1,282.95
  4. Step 4: Simplify right side
    2,122.20x = 3,757,189.64
  5. Step 5: Solve for x
    x = 3,757,189.64/2,122.20
  6. Step 6: Final answer
    x = 1,770.42

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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.