Home / 1,971.18-2,719.41-1,382.11

Finding the Fourth Proportional to 1,971.18, 2,719.41 and 1,382.11

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Solution

The fourth proportional to 1,971.18, 2,719.41 and 1,382.11 is: 1,906.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,971.18 : 2,719.41 = 1,382.11 : x
  2. Step 2: Convert to fraction form
    1,971.18/2,719.41 = 1,382.11/x
  3. Step 3: Cross multiply
    1,971.18x = 2,719.41 × 1,382.11
  4. Step 4: Simplify right side
    1,971.18x = 3,758,527.21
  5. Step 5: Solve for x
    x = 3,758,527.21/1,971.18
  6. Step 6: Final answer
    x = 1,906.74

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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.