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Finding the Fourth Proportional to 289.92, 435.05 and 116.66

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Solution

The fourth proportional to 289.92, 435.05 and 116.66 is: 175.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.92 : 435.05 = 116.66 : x
  2. Step 2: Convert to fraction form
    289.92/435.05 = 116.66/x
  3. Step 3: Cross multiply
    289.92x = 435.05 × 116.66
  4. Step 4: Simplify right side
    289.92x = 50,753.87
  5. Step 5: Solve for x
    x = 50,753.87/289.92
  6. Step 6: Final answer
    x = 175.06

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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.