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Finding the Fourth Proportional to 163.07, 243.29 and 155.32

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Solution

The fourth proportional to 163.07, 243.29 and 155.32 is: 231.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.07 : 243.29 = 155.32 : x
  2. Step 2: Convert to fraction form
    163.07/243.29 = 155.32/x
  3. Step 3: Cross multiply
    163.07x = 243.29 × 155.32
  4. Step 4: Simplify right side
    163.07x = 37,787.80
  5. Step 5: Solve for x
    x = 37,787.80/163.07
  6. Step 6: Final answer
    x = 231.73

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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.