Home / 2,187.48-3,281.10-1,321.56

Finding the Fourth Proportional to 2,187.48, 3,281.10 and 1,321.56

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Solution

The fourth proportional to 2,187.48, 3,281.10 and 1,321.56 is: 1,982.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.48 : 3,281.10 = 1,321.56 : x
  2. Step 2: Convert to fraction form
    2,187.48/3,281.10 = 1,321.56/x
  3. Step 3: Cross multiply
    2,187.48x = 3,281.10 × 1,321.56
  4. Step 4: Simplify right side
    2,187.48x = 4,336,170.52
  5. Step 5: Solve for x
    x = 4,336,170.52/2,187.48
  6. Step 6: Final answer
    x = 1,982.27

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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.