Home / 2,211.82-3,317.50-1,387.60

Finding the Fourth Proportional to 2,211.82, 3,317.50 and 1,387.60

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Solution

The fourth proportional to 2,211.82, 3,317.50 and 1,387.60 is: 2,081.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,211.82 : 3,317.50 = 1,387.60 : x
  2. Step 2: Convert to fraction form
    2,211.82/3,317.50 = 1,387.60/x
  3. Step 3: Cross multiply
    2,211.82x = 3,317.50 × 1,387.60
  4. Step 4: Simplify right side
    2,211.82x = 4,603,363
  5. Step 5: Solve for x
    x = 4,603,363/2,211.82
  6. Step 6: Final answer
    x = 2,081.26

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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.