Home / 2,541.28-3,811.92-1,386.40

Finding the Fourth Proportional to 2,541.28, 3,811.92 and 1,386.40

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Solution

The fourth proportional to 2,541.28, 3,811.92 and 1,386.40 is: 2,079.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,541.28 : 3,811.92 = 1,386.40 : x
  2. Step 2: Convert to fraction form
    2,541.28/3,811.92 = 1,386.40/x
  3. Step 3: Cross multiply
    2,541.28x = 3,811.92 × 1,386.40
  4. Step 4: Simplify right side
    2,541.28x = 5,284,845.89
  5. Step 5: Solve for x
    x = 5,284,845.89/2,541.28
  6. Step 6: Final answer
    x = 2,079.60

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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.