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Finding the Fourth Proportional to 1,695.90, 2,544.31 and 860.96

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Solution

The fourth proportional to 1,695.90, 2,544.31 and 860.96 is: 1,291.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,695.90 : 2,544.31 = 860.96 : x
  2. Step 2: Convert to fraction form
    1,695.90/2,544.31 = 860.96/x
  3. Step 3: Cross multiply
    1,695.90x = 2,544.31 × 860.96
  4. Step 4: Simplify right side
    1,695.90x = 2,190,556.57
  5. Step 5: Solve for x
    x = 2,190,556.57/1,695.90
  6. Step 6: Final answer
    x = 1,291.68

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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.