Home / 2,780.32-3,836.80-1,521.44

Finding the Fourth Proportional to 2,780.32, 3,836.80 and 1,521.44

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Solution

The fourth proportional to 2,780.32, 3,836.80 and 1,521.44 is: 2,099.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.32 : 3,836.80 = 1,521.44 : x
  2. Step 2: Convert to fraction form
    2,780.32/3,836.80 = 1,521.44/x
  3. Step 3: Cross multiply
    2,780.32x = 3,836.80 × 1,521.44
  4. Step 4: Simplify right side
    2,780.32x = 5,837,460.99
  5. Step 5: Solve for x
    x = 5,837,460.99/2,780.32
  6. Step 6: Final answer
    x = 2,099.56

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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.