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Finding the Fourth Proportional to 611.13, 914.54 and 446.79

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Solution

The fourth proportional to 611.13, 914.54 and 446.79 is: 668.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.13 : 914.54 = 446.79 : x
  2. Step 2: Convert to fraction form
    611.13/914.54 = 446.79/x
  3. Step 3: Cross multiply
    611.13x = 914.54 × 446.79
  4. Step 4: Simplify right side
    611.13x = 408,605.09
  5. Step 5: Solve for x
    x = 408,605.09/611.13
  6. Step 6: Final answer
    x = 668.61

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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.