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Finding the Fourth Proportional to 2,321.30, 3,481.31 and 655.31

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Solution

The fourth proportional to 2,321.30, 3,481.31 and 655.31 is: 982.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,321.30 : 3,481.31 = 655.31 : x
  2. Step 2: Convert to fraction form
    2,321.30/3,481.31 = 655.31/x
  3. Step 3: Cross multiply
    2,321.30x = 3,481.31 × 655.31
  4. Step 4: Simplify right side
    2,321.30x = 2,281,347.60
  5. Step 5: Solve for x
    x = 2,281,347.60/2,321.30
  6. Step 6: Final answer
    x = 982.79

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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.