Home / 3,979.58-5,492.01-2,211.20

Finding the Fourth Proportional to 3,979.58, 5,492.01 and 2,211.20

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Solution

The fourth proportional to 3,979.58, 5,492.01 and 2,211.20 is: 3,051.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,979.58 : 5,492.01 = 2,211.20 : x
  2. Step 2: Convert to fraction form
    3,979.58/5,492.01 = 2,211.20/x
  3. Step 3: Cross multiply
    3,979.58x = 5,492.01 × 2,211.20
  4. Step 4: Simplify right side
    3,979.58x = 12,143,932.51
  5. Step 5: Solve for x
    x = 12,143,932.51/3,979.58
  6. Step 6: Final answer
    x = 3,051.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.