Home / 2,211.65-3,318.23-1,388.96

Finding the Fourth Proportional to 2,211.65, 3,318.23 and 1,388.96

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Solution

The fourth proportional to 2,211.65, 3,318.23 and 1,388.96 is: 2,083.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,211.65 : 3,318.23 = 1,388.96 : x
  2. Step 2: Convert to fraction form
    2,211.65/3,318.23 = 1,388.96/x
  3. Step 3: Cross multiply
    2,211.65x = 3,318.23 × 1,388.96
  4. Step 4: Simplify right side
    2,211.65x = 4,608,888.74
  5. Step 5: Solve for x
    x = 4,608,888.74/2,211.65
  6. Step 6: Final answer
    x = 2,083.91

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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.