Home / 2,211.90-3,317.88-979.02

Finding the Fourth Proportional to 2,211.90, 3,317.88 and 979.02

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Solution

The fourth proportional to 2,211.90, 3,317.88 and 979.02 is: 1,468.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,211.90 : 3,317.88 = 979.02 : x
  2. Step 2: Convert to fraction form
    2,211.90/3,317.88 = 979.02/x
  3. Step 3: Cross multiply
    2,211.90x = 3,317.88 × 979.02
  4. Step 4: Simplify right side
    2,211.90x = 3,248,270.88
  5. Step 5: Solve for x
    x = 3,248,270.88/2,211.90
  6. Step 6: Final answer
    x = 1,468.54

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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.