Home / 2,321.20-3,478.54-1,281.69

Finding the Fourth Proportional to 2,321.20, 3,478.54 and 1,281.69

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Solution

The fourth proportional to 2,321.20, 3,478.54 and 1,281.69 is: 1,920.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,321.20 : 3,478.54 = 1,281.69 : x
  2. Step 2: Convert to fraction form
    2,321.20/3,478.54 = 1,281.69/x
  3. Step 3: Cross multiply
    2,321.20x = 3,478.54 × 1,281.69
  4. Step 4: Simplify right side
    2,321.20x = 4,458,409.93
  5. Step 5: Solve for x
    x = 4,458,409.93/2,321.20
  6. Step 6: Final answer
    x = 1,920.73

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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.