Home / 2,287.12-3,419.88-1,991.92

Finding the Fourth Proportional to 2,287.12, 3,419.88 and 1,991.92

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Solution

The fourth proportional to 2,287.12, 3,419.88 and 1,991.92 is: 2,978.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,287.12 : 3,419.88 = 1,991.92 : x
  2. Step 2: Convert to fraction form
    2,287.12/3,419.88 = 1,991.92/x
  3. Step 3: Cross multiply
    2,287.12x = 3,419.88 × 1,991.92
  4. Step 4: Simplify right side
    2,287.12x = 6,812,127.37
  5. Step 5: Solve for x
    x = 6,812,127.37/2,287.12
  6. Step 6: Final answer
    x = 2,978.47

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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.