Home / 2,736.40-3,774.92-1,989.20

Finding the Fourth Proportional to 2,736.40, 3,774.92 and 1,989.20

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Solution

The fourth proportional to 2,736.40, 3,774.92 and 1,989.20 is: 2,744.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,736.40 : 3,774.92 = 1,989.20 : x
  2. Step 2: Convert to fraction form
    2,736.40/3,774.92 = 1,989.20/x
  3. Step 3: Cross multiply
    2,736.40x = 3,774.92 × 1,989.20
  4. Step 4: Simplify right side
    2,736.40x = 7,509,070.86
  5. Step 5: Solve for x
    x = 7,509,070.86/2,736.40
  6. Step 6: Final answer
    x = 2,744.14

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.