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Finding the Fourth Proportional to 163.36, 243.88 and 153.58

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Solution

The fourth proportional to 163.36, 243.88 and 153.58 is: 229.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.36 : 243.88 = 153.58 : x
  2. Step 2: Convert to fraction form
    163.36/243.88 = 153.58/x
  3. Step 3: Cross multiply
    163.36x = 243.88 × 153.58
  4. Step 4: Simplify right side
    163.36x = 37,455.09
  5. Step 5: Solve for x
    x = 37,455.09/163.36
  6. Step 6: Final answer
    x = 229.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.