Home / 3,985.70-5,979.23-1,212.65

Finding the Fourth Proportional to 3,985.70, 5,979.23 and 1,212.65

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Solution

The fourth proportional to 3,985.70, 5,979.23 and 1,212.65 is: 1,819.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.70 : 5,979.23 = 1,212.65 : x
  2. Step 2: Convert to fraction form
    3,985.70/5,979.23 = 1,212.65/x
  3. Step 3: Cross multiply
    3,985.70x = 5,979.23 × 1,212.65
  4. Step 4: Simplify right side
    3,985.70x = 7,250,713.26
  5. Step 5: Solve for x
    x = 7,250,713.26/3,985.70
  6. Step 6: Final answer
    x = 1,819.18

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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.