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Finding the Fourth Proportional to 281.24, 388.06 and 163.18

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Solution

The fourth proportional to 281.24, 388.06 and 163.18 is: 225.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    281.24 : 388.06 = 163.18 : x
  2. Step 2: Convert to fraction form
    281.24/388.06 = 163.18/x
  3. Step 3: Cross multiply
    281.24x = 388.06 × 163.18
  4. Step 4: Simplify right side
    281.24x = 63,322.25
  5. Step 5: Solve for x
    x = 63,322.25/281.24
  6. Step 6: Final answer
    x = 225.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.