Home / 3,928.50-5,421.33-2,272.50

Finding the Fourth Proportional to 3,928.50, 5,421.33 and 2,272.50

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Solution

The fourth proportional to 3,928.50, 5,421.33 and 2,272.50 is: 3,136.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.50 : 5,421.33 = 2,272.50 : x
  2. Step 2: Convert to fraction form
    3,928.50/5,421.33 = 2,272.50/x
  3. Step 3: Cross multiply
    3,928.50x = 5,421.33 × 2,272.50
  4. Step 4: Simplify right side
    3,928.50x = 12,319,972.43
  5. Step 5: Solve for x
    x = 12,319,972.43/3,928.50
  6. Step 6: Final answer
    x = 3,136.05

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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.