Home / 3,211.56-4,814.70-1,431.32

Finding the Fourth Proportional to 3,211.56, 4,814.70 and 1,431.32

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Solution

The fourth proportional to 3,211.56, 4,814.70 and 1,431.32 is: 2,145.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.56 : 4,814.70 = 1,431.32 : x
  2. Step 2: Convert to fraction form
    3,211.56/4,814.70 = 1,431.32/x
  3. Step 3: Cross multiply
    3,211.56x = 4,814.70 × 1,431.32
  4. Step 4: Simplify right side
    3,211.56x = 6,891,352.33
  5. Step 5: Solve for x
    x = 6,891,352.33/3,211.56
  6. Step 6: Final answer
    x = 2,145.80

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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.