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Finding the Fourth Proportional to 289.25, 433.70 and 115.99

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Solution

The fourth proportional to 289.25, 433.70 and 115.99 is: 173.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.25 : 433.70 = 115.99 : x
  2. Step 2: Convert to fraction form
    289.25/433.70 = 115.99/x
  3. Step 3: Cross multiply
    289.25x = 433.70 × 115.99
  4. Step 4: Simplify right side
    289.25x = 50,304.83
  5. Step 5: Solve for x
    x = 50,304.83/289.25
  6. Step 6: Final answer
    x = 173.92

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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.