Home / 1,221.96-1,831.23-605.07

Finding the Fourth Proportional to 1,221.96, 1,831.23 and 605.07

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Solution

The fourth proportional to 1,221.96, 1,831.23 and 605.07 is: 906.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.96 : 1,831.23 = 605.07 : x
  2. Step 2: Convert to fraction form
    1,221.96/1,831.23 = 605.07/x
  3. Step 3: Cross multiply
    1,221.96x = 1,831.23 × 605.07
  4. Step 4: Simplify right side
    1,221.96x = 1,108,022.34
  5. Step 5: Solve for x
    x = 1,108,022.34/1,221.96
  6. Step 6: Final answer
    x = 906.76

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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.