Home / 1,221.11-1,831.67-296.67

Finding the Fourth Proportional to 1,221.11, 1,831.67 and 296.67

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Solution

The fourth proportional to 1,221.11, 1,831.67 and 296.67 is: 445.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.11 : 1,831.67 = 296.67 : x
  2. Step 2: Convert to fraction form
    1,221.11/1,831.67 = 296.67/x
  3. Step 3: Cross multiply
    1,221.11x = 1,831.67 × 296.67
  4. Step 4: Simplify right side
    1,221.11x = 543,403.72
  5. Step 5: Solve for x
    x = 543,403.72/1,221.11
  6. Step 6: Final answer
    x = 445.01

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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.