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Finding the Fourth Proportional to 611.42, 914.49 and 446.99

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Solution

The fourth proportional to 611.42, 914.49 and 446.99 is: 668.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.42 : 914.49 = 446.99 : x
  2. Step 2: Convert to fraction form
    611.42/914.49 = 446.99/x
  3. Step 3: Cross multiply
    611.42x = 914.49 × 446.99
  4. Step 4: Simplify right side
    611.42x = 408,763.31
  5. Step 5: Solve for x
    x = 408,763.31/611.42
  6. Step 6: Final answer
    x = 668.55

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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.