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Finding the Fourth Proportional to 756.87, 1,134.89 and 236.72

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Solution

The fourth proportional to 756.87, 1,134.89 and 236.72 is: 354.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    756.87 : 1,134.89 = 236.72 : x
  2. Step 2: Convert to fraction form
    756.87/1,134.89 = 236.72/x
  3. Step 3: Cross multiply
    756.87x = 1,134.89 × 236.72
  4. Step 4: Simplify right side
    756.87x = 268,653.70
  5. Step 5: Solve for x
    x = 268,653.70/756.87
  6. Step 6: Final answer
    x = 354.96

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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.