Home / 2,181.85-3,272.79-621.87

Finding the Fourth Proportional to 2,181.85, 3,272.79 and 621.87

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Solution

The fourth proportional to 2,181.85, 3,272.79 and 621.87 is: 932.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.85 : 3,272.79 = 621.87 : x
  2. Step 2: Convert to fraction form
    2,181.85/3,272.79 = 621.87/x
  3. Step 3: Cross multiply
    2,181.85x = 3,272.79 × 621.87
  4. Step 4: Simplify right side
    2,181.85x = 2,035,249.92
  5. Step 5: Solve for x
    x = 2,035,249.92/2,181.85
  6. Step 6: Final answer
    x = 932.81

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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.