Home / 2,782.56-4,170.36-1,318.80

Finding the Fourth Proportional to 2,782.56, 4,170.36 and 1,318.80

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Solution

The fourth proportional to 2,782.56, 4,170.36 and 1,318.80 is: 1,976.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,782.56 : 4,170.36 = 1,318.80 : x
  2. Step 2: Convert to fraction form
    2,782.56/4,170.36 = 1,318.80/x
  3. Step 3: Cross multiply
    2,782.56x = 4,170.36 × 1,318.80
  4. Step 4: Simplify right side
    2,782.56x = 5,499,870.77
  5. Step 5: Solve for x
    x = 5,499,870.77/2,782.56
  6. Step 6: Final answer
    x = 1,976.55

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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.