Home / 3,928.88-5,422.32-2,357.84

Finding the Fourth Proportional to 3,928.88, 5,422.32 and 2,357.84

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Solution

The fourth proportional to 3,928.88, 5,422.32 and 2,357.84 is: 3,254.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.88 : 5,422.32 = 2,357.84 : x
  2. Step 2: Convert to fraction form
    3,928.88/5,422.32 = 2,357.84/x
  3. Step 3: Cross multiply
    3,928.88x = 5,422.32 × 2,357.84
  4. Step 4: Simplify right side
    3,928.88x = 12,784,962.99
  5. Step 5: Solve for x
    x = 12,784,962.99/3,928.88
  6. Step 6: Final answer
    x = 3,254.10

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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.