Home / 3,620.74-5,431.84-1,281.38

Finding the Fourth Proportional to 3,620.74, 5,431.84 and 1,281.38

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Solution

The fourth proportional to 3,620.74, 5,431.84 and 1,281.38 is: 1,922.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.74 : 5,431.84 = 1,281.38 : x
  2. Step 2: Convert to fraction form
    3,620.74/5,431.84 = 1,281.38/x
  3. Step 3: Cross multiply
    3,620.74x = 5,431.84 × 1,281.38
  4. Step 4: Simplify right side
    3,620.74x = 6,960,251.14
  5. Step 5: Solve for x
    x = 6,960,251.14/3,620.74
  6. Step 6: Final answer
    x = 1,922.33

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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.