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Finding the Fourth Proportional to 289.14, 432.66 and 173.64

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Solution

The fourth proportional to 289.14, 432.66 and 173.64 is: 259.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.14 : 432.66 = 173.64 : x
  2. Step 2: Convert to fraction form
    289.14/432.66 = 173.64/x
  3. Step 3: Cross multiply
    289.14x = 432.66 × 173.64
  4. Step 4: Simplify right side
    289.14x = 75,127.08
  5. Step 5: Solve for x
    x = 75,127.08/289.14
  6. Step 6: Final answer
    x = 259.83

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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.