Home / 3,985.75-5,976.79-1,211.81

Finding the Fourth Proportional to 3,985.75, 5,976.79 and 1,211.81

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Solution

The fourth proportional to 3,985.75, 5,976.79 and 1,211.81 is: 1,817.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,985.75 : 5,976.79 = 1,211.81 : x
  2. Step 2: Convert to fraction form
    3,985.75/5,976.79 = 1,211.81/x
  3. Step 3: Cross multiply
    3,985.75x = 5,976.79 × 1,211.81
  4. Step 4: Simplify right side
    3,985.75x = 7,242,700.98
  5. Step 5: Solve for x
    x = 7,242,700.98/3,985.75
  6. Step 6: Final answer
    x = 1,817.15

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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.