Home / 2,178.21-3,261.85-1,691.61

Finding the Fourth Proportional to 2,178.21, 3,261.85 and 1,691.61

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Solution

The fourth proportional to 2,178.21, 3,261.85 and 1,691.61 is: 2,533.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,178.21 : 3,261.85 = 1,691.61 : x
  2. Step 2: Convert to fraction form
    2,178.21/3,261.85 = 1,691.61/x
  3. Step 3: Cross multiply
    2,178.21x = 3,261.85 × 1,691.61
  4. Step 4: Simplify right side
    2,178.21x = 5,517,778.08
  5. Step 5: Solve for x
    x = 5,517,778.08/2,178.21
  6. Step 6: Final answer
    x = 2,533.17

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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.