Home / 1,221.27-1,831.69-355.38

Finding the Fourth Proportional to 1,221.27, 1,831.69 and 355.38

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Solution

The fourth proportional to 1,221.27, 1,831.69 and 355.38 is: 533.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.27 : 1,831.69 = 355.38 : x
  2. Step 2: Convert to fraction form
    1,221.27/1,831.69 = 355.38/x
  3. Step 3: Cross multiply
    1,221.27x = 1,831.69 × 355.38
  4. Step 4: Simplify right side
    1,221.27x = 650,945.99
  5. Step 5: Solve for x
    x = 650,945.99/1,221.27
  6. Step 6: Final answer
    x = 533.01

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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.