Home / 2,780.64-3,836.88-1,896.48

Finding the Fourth Proportional to 2,780.64, 3,836.88 and 1,896.48

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Solution

The fourth proportional to 2,780.64, 3,836.88 and 1,896.48 is: 2,616.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.64 : 3,836.88 = 1,896.48 : x
  2. Step 2: Convert to fraction form
    2,780.64/3,836.88 = 1,896.48/x
  3. Step 3: Cross multiply
    2,780.64x = 3,836.88 × 1,896.48
  4. Step 4: Simplify right side
    2,780.64x = 7,276,566.18
  5. Step 5: Solve for x
    x = 7,276,566.18/2,780.64
  6. Step 6: Final answer
    x = 2,616.87

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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.