Home / 2,121.61-2,928.06-1,282.75

Finding the Fourth Proportional to 2,121.61, 2,928.06 and 1,282.75

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Solution

The fourth proportional to 2,121.61, 2,928.06 and 1,282.75 is: 1,770.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.61 : 2,928.06 = 1,282.75 : x
  2. Step 2: Convert to fraction form
    2,121.61/2,928.06 = 1,282.75/x
  3. Step 3: Cross multiply
    2,121.61x = 2,928.06 × 1,282.75
  4. Step 4: Simplify right side
    2,121.61x = 3,755,968.97
  5. Step 5: Solve for x
    x = 3,755,968.97/2,121.61
  6. Step 6: Final answer
    x = 1,770.34

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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.