Home / 1,221.28-1,831.66-554.24

Finding the Fourth Proportional to 1,221.28, 1,831.66 and 554.24

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Solution

The fourth proportional to 1,221.28, 1,831.66 and 554.24 is: 831.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221.28 : 1,831.66 = 554.24 : x
  2. Step 2: Convert to fraction form
    1,221.28/1,831.66 = 554.24/x
  3. Step 3: Cross multiply
    1,221.28x = 1,831.66 × 554.24
  4. Step 4: Simplify right side
    1,221.28x = 1,015,185.55
  5. Step 5: Solve for x
    x = 1,015,185.55/1,221.28
  6. Step 6: Final answer
    x = 831.25

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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.