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Finding the Fourth Proportional to 2,780.44, 3,836.96 and 1,538.44

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Solution

The fourth proportional to 2,780.44, 3,836.96 and 1,538.44 is: 2,123.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.44 : 3,836.96 = 1,538.44 : x
  2. Step 2: Convert to fraction form
    2,780.44/3,836.96 = 1,538.44/x
  3. Step 3: Cross multiply
    2,780.44x = 3,836.96 × 1,538.44
  4. Step 4: Simplify right side
    2,780.44x = 5,902,932.74
  5. Step 5: Solve for x
    x = 5,902,932.74/2,780.44
  6. Step 6: Final answer
    x = 2,123.02

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1.5x scale

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.