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Finding the Fourth Proportional to 2,319.88, 3,481.19 and 860.05

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Solution

The fourth proportional to 2,319.88, 3,481.19 and 860.05 is: 1,290.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,319.88 : 3,481.19 = 860.05 : x
  2. Step 2: Convert to fraction form
    2,319.88/3,481.19 = 860.05/x
  3. Step 3: Cross multiply
    2,319.88x = 3,481.19 × 860.05
  4. Step 4: Simplify right side
    2,319.88x = 2,993,993.16
  5. Step 5: Solve for x
    x = 2,993,993.16/2,319.88
  6. Step 6: Final answer
    x = 1,290.58

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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.