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Finding the Fourth Proportional to 481.43, 722.66 and 391.22

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Solution

The fourth proportional to 481.43, 722.66 and 391.22 is: 587.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.43 : 722.66 = 391.22 : x
  2. Step 2: Convert to fraction form
    481.43/722.66 = 391.22/x
  3. Step 3: Cross multiply
    481.43x = 722.66 × 391.22
  4. Step 4: Simplify right side
    481.43x = 282,713.48
  5. Step 5: Solve for x
    x = 282,713.48/481.43
  6. Step 6: Final answer
    x = 587.24

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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.