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Finding the Fourth Proportional to 189.87, 285.50 and 174.84

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Solution

The fourth proportional to 189.87, 285.50 and 174.84 is: 262.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.87 : 285.50 = 174.84 : x
  2. Step 2: Convert to fraction form
    189.87/285.50 = 174.84/x
  3. Step 3: Cross multiply
    189.87x = 285.50 × 174.84
  4. Step 4: Simplify right side
    189.87x = 49,916.82
  5. Step 5: Solve for x
    x = 49,916.82/189.87
  6. Step 6: Final answer
    x = 262.90

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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.