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Finding the Fourth Proportional to 289.08, 433.72 and 115.66

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Solution

The fourth proportional to 289.08, 433.72 and 115.66 is: 173.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.08 : 433.72 = 115.66 : x
  2. Step 2: Convert to fraction form
    289.08/433.72 = 115.66/x
  3. Step 3: Cross multiply
    289.08x = 433.72 × 115.66
  4. Step 4: Simplify right side
    289.08x = 50,164.06
  5. Step 5: Solve for x
    x = 50,164.06/289.08
  6. Step 6: Final answer
    x = 173.53

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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.