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Finding the Fourth Proportional to 163.32, 242.99 and 162.78

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Solution

The fourth proportional to 163.32, 242.99 and 162.78 is: 242.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    163.32 : 242.99 = 162.78 : x
  2. Step 2: Convert to fraction form
    163.32/242.99 = 162.78/x
  3. Step 3: Cross multiply
    163.32x = 242.99 × 162.78
  4. Step 4: Simplify right side
    163.32x = 39,553.10
  5. Step 5: Solve for x
    x = 39,553.10/163.32
  6. Step 6: Final answer
    x = 242.18

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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.