Home / 2,211.56-3,316.26-1,287.32

Finding the Fourth Proportional to 2,211.56, 3,316.26 and 1,287.32

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Solution

The fourth proportional to 2,211.56, 3,316.26 and 1,287.32 is: 1,930.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,211.56 : 3,316.26 = 1,287.32 : x
  2. Step 2: Convert to fraction form
    2,211.56/3,316.26 = 1,287.32/x
  3. Step 3: Cross multiply
    2,211.56x = 3,316.26 × 1,287.32
  4. Step 4: Simplify right side
    2,211.56x = 4,269,071.24
  5. Step 5: Solve for x
    x = 4,269,071.24/2,211.56
  6. Step 6: Final answer
    x = 1,930.35

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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.