Home / 3,928.64-5,421.90-2,250.32

Finding the Fourth Proportional to 3,928.64, 5,421.90 and 2,250.32

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Solution

The fourth proportional to 3,928.64, 5,421.90 and 2,250.32 is: 3,105.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.64 : 5,421.90 = 2,250.32 : x
  2. Step 2: Convert to fraction form
    3,928.64/5,421.90 = 2,250.32/x
  3. Step 3: Cross multiply
    3,928.64x = 5,421.90 × 2,250.32
  4. Step 4: Simplify right side
    3,928.64x = 12,200,991.34
  5. Step 5: Solve for x
    x = 12,200,991.34/3,928.64
  6. Step 6: Final answer
    x = 3,105.66

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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.