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Finding the Fourth Proportional to 209.04, 312.24 and 163.44

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Solution

The fourth proportional to 209.04, 312.24 and 163.44 is: 244.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    209.04 : 312.24 = 163.44 : x
  2. Step 2: Convert to fraction form
    209.04/312.24 = 163.44/x
  3. Step 3: Cross multiply
    209.04x = 312.24 × 163.44
  4. Step 4: Simplify right side
    209.04x = 51,032.51
  5. Step 5: Solve for x
    x = 51,032.51/209.04
  6. Step 6: Final answer
    x = 244.13

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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.