Home / 2,215.67-3,318-1,288.41

Finding the Fourth Proportional to 2,215.67, 3,318 and 1,288.41

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Solution

The fourth proportional to 2,215.67, 3,318 and 1,288.41 is: 1,929.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,215.67 : 3,318 = 1,288.41 : x
  2. Step 2: Convert to fraction form
    2,215.67/3,318 = 1,288.41/x
  3. Step 3: Cross multiply
    2,215.67x = 3,318 × 1,288.41
  4. Step 4: Simplify right side
    2,215.67x = 4,274,944.38
  5. Step 5: Solve for x
    x = 4,274,944.38/2,215.67
  6. Step 6: Final answer
    x = 1,929.42

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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.