Home / 2,845.12-3,928.20-2,322.40

Finding the Fourth Proportional to 2,845.12, 3,928.20 and 2,322.40

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Solution

The fourth proportional to 2,845.12, 3,928.20 and 2,322.40 is: 3,206.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,845.12 : 3,928.20 = 2,322.40 : x
  2. Step 2: Convert to fraction form
    2,845.12/3,928.20 = 2,322.40/x
  3. Step 3: Cross multiply
    2,845.12x = 3,928.20 × 2,322.40
  4. Step 4: Simplify right side
    2,845.12x = 9,122,851.68
  5. Step 5: Solve for x
    x = 9,122,851.68/2,845.12
  6. Step 6: Final answer
    x = 3,206.49

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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.