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Finding the Fourth Proportional to 289.92, 435.20 and 119.04

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Solution

The fourth proportional to 289.92, 435.20 and 119.04 is: 178.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.92 : 435.20 = 119.04 : x
  2. Step 2: Convert to fraction form
    289.92/435.20 = 119.04/x
  3. Step 3: Cross multiply
    289.92x = 435.20 × 119.04
  4. Step 4: Simplify right side
    289.92x = 51,806.21
  5. Step 5: Solve for x
    x = 51,806.21/289.92
  6. Step 6: Final answer
    x = 178.69

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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.