Home / 2,780.82-4,171.32-1,319.22

Finding the Fourth Proportional to 2,780.82, 4,171.32 and 1,319.22

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Solution

The fourth proportional to 2,780.82, 4,171.32 and 1,319.22 is: 1,978.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.82 : 4,171.32 = 1,319.22 : x
  2. Step 2: Convert to fraction form
    2,780.82/4,171.32 = 1,319.22/x
  3. Step 3: Cross multiply
    2,780.82x = 4,171.32 × 1,319.22
  4. Step 4: Simplify right side
    2,780.82x = 5,502,888.77
  5. Step 5: Solve for x
    x = 5,502,888.77/2,780.82
  6. Step 6: Final answer
    x = 1,978.87

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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.