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Finding the Fourth Proportional to 289.72, 434.62 and 168.04

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Solution

The fourth proportional to 289.72, 434.62 and 168.04 is: 252.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.72 : 434.62 = 168.04 : x
  2. Step 2: Convert to fraction form
    289.72/434.62 = 168.04/x
  3. Step 3: Cross multiply
    289.72x = 434.62 × 168.04
  4. Step 4: Simplify right side
    289.72x = 73,033.54
  5. Step 5: Solve for x
    x = 73,033.54/289.72
  6. Step 6: Final answer
    x = 252.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.