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Finding the Fourth Proportional to 2,708.47, 4,063.22 and 860.05

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Solution

The fourth proportional to 2,708.47, 4,063.22 and 860.05 is: 1,290.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,708.47 : 4,063.22 = 860.05 : x
  2. Step 2: Convert to fraction form
    2,708.47/4,063.22 = 860.05/x
  3. Step 3: Cross multiply
    2,708.47x = 4,063.22 × 860.05
  4. Step 4: Simplify right side
    2,708.47x = 3,494,576.36
  5. Step 5: Solve for x
    x = 3,494,576.36/2,708.47
  6. Step 6: Final answer
    x = 1,290.24

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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.