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Finding the Fourth Proportional to 754.96, 1,129.70 and 446.96

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Solution

The fourth proportional to 754.96, 1,129.70 and 446.96 is: 668.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.96 : 1,129.70 = 446.96 : x
  2. Step 2: Convert to fraction form
    754.96/1,129.70 = 446.96/x
  3. Step 3: Cross multiply
    754.96x = 1,129.70 × 446.96
  4. Step 4: Simplify right side
    754.96x = 504,930.71
  5. Step 5: Solve for x
    x = 504,930.71/754.96
  6. Step 6: Final answer
    x = 668.82

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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.