Home / 3,927.28-5,890.84-1,978.96

Finding the Fourth Proportional to 3,927.28, 5,890.84 and 1,978.96

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Solution

The fourth proportional to 3,927.28, 5,890.84 and 1,978.96 is: 2,968.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,927.28 : 5,890.84 = 1,978.96 : x
  2. Step 2: Convert to fraction form
    3,927.28/5,890.84 = 1,978.96/x
  3. Step 3: Cross multiply
    3,927.28x = 5,890.84 × 1,978.96
  4. Step 4: Simplify right side
    3,927.28x = 11,657,736.73
  5. Step 5: Solve for x
    x = 11,657,736.73/3,927.28
  6. Step 6: Final answer
    x = 2,968.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.