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Finding the Fourth Proportional to 289.56, 433.08 and 173.72

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Solution

The fourth proportional to 289.56, 433.08 and 173.72 is: 259.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.56 : 433.08 = 173.72 : x
  2. Step 2: Convert to fraction form
    289.56/433.08 = 173.72/x
  3. Step 3: Cross multiply
    289.56x = 433.08 × 173.72
  4. Step 4: Simplify right side
    289.56x = 75,234.66
  5. Step 5: Solve for x
    x = 75,234.66/289.56
  6. Step 6: Final answer
    x = 259.82

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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.