Home / 1,221.30-1,831.93-296.87

Finding the Fourth Proportional to 1,221.30, 1,831.93 and 296.87

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Solution

The fourth proportional to 1,221.30, 1,831.93 and 296.87 is: 445.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.30 : 1,831.93 = 296.87 : x
  2. Step 2: Convert to fraction form
    1,221.30/1,831.93 = 296.87/x
  3. Step 3: Cross multiply
    1,221.30x = 1,831.93 × 296.87
  4. Step 4: Simplify right side
    1,221.30x = 543,834.60
  5. Step 5: Solve for x
    x = 543,834.60/1,221.30
  6. Step 6: Final answer
    x = 445.29

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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.