Home / 3,981.09-5,971.81-1,208.15

Finding the Fourth Proportional to 3,981.09, 5,971.81 and 1,208.15

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Solution

The fourth proportional to 3,981.09, 5,971.81 and 1,208.15 is: 1,812.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.09 : 5,971.81 = 1,208.15 : x
  2. Step 2: Convert to fraction form
    3,981.09/5,971.81 = 1,208.15/x
  3. Step 3: Cross multiply
    3,981.09x = 5,971.81 × 1,208.15
  4. Step 4: Simplify right side
    3,981.09x = 7,214,842.25
  5. Step 5: Solve for x
    x = 7,214,842.25/3,981.09
  6. Step 6: Final answer
    x = 1,812.28

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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.