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Finding the Fourth Proportional to 2,092.68, 3,138.48 and 860.04

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Solution

The fourth proportional to 2,092.68, 3,138.48 and 860.04 is: 1,289.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,092.68 : 3,138.48 = 860.04 : x
  2. Step 2: Convert to fraction form
    2,092.68/3,138.48 = 860.04/x
  3. Step 3: Cross multiply
    2,092.68x = 3,138.48 × 860.04
  4. Step 4: Simplify right side
    2,092.68x = 2,699,218.34
  5. Step 5: Solve for x
    x = 2,699,218.34/2,092.68
  6. Step 6: Final answer
    x = 1,289.84

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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.