Home / 2,122.10-2,928.59-1,282.80

Finding the Fourth Proportional to 2,122.10, 2,928.59 and 1,282.80

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Solution

The fourth proportional to 2,122.10, 2,928.59 and 1,282.80 is: 1,770.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.10 : 2,928.59 = 1,282.80 : x
  2. Step 2: Convert to fraction form
    2,122.10/2,928.59 = 1,282.80/x
  3. Step 3: Cross multiply
    2,122.10x = 2,928.59 × 1,282.80
  4. Step 4: Simplify right side
    2,122.10x = 3,756,795.25
  5. Step 5: Solve for x
    x = 3,756,795.25/2,122.10
  6. Step 6: Final answer
    x = 1,770.32

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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.