Home / 3,981.39-5,972.70-1,207.71

Finding the Fourth Proportional to 3,981.39, 5,972.70 and 1,207.71

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Solution

The fourth proportional to 3,981.39, 5,972.70 and 1,207.71 is: 1,811.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981.39 : 5,972.70 = 1,207.71 : x
  2. Step 2: Convert to fraction form
    3,981.39/5,972.70 = 1,207.71/x
  3. Step 3: Cross multiply
    3,981.39x = 5,972.70 × 1,207.71
  4. Step 4: Simplify right side
    3,981.39x = 7,213,289.52
  5. Step 5: Solve for x
    x = 7,213,289.52/3,981.39
  6. Step 6: Final answer
    x = 1,811.75

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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.