Home / 2,781.28-3,838.08-1,539.28

Finding the Fourth Proportional to 2,781.28, 3,838.08 and 1,539.28

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Solution

The fourth proportional to 2,781.28, 3,838.08 and 1,539.28 is: 2,124.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,781.28 : 3,838.08 = 1,539.28 : x
  2. Step 2: Convert to fraction form
    2,781.28/3,838.08 = 1,539.28/x
  3. Step 3: Cross multiply
    2,781.28x = 3,838.08 × 1,539.28
  4. Step 4: Simplify right side
    2,781.28x = 5,907,879.78
  5. Step 5: Solve for x
    x = 5,907,879.78/2,781.28
  6. Step 6: Final answer
    x = 2,124.16

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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.