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Finding the Fourth Proportional to 436.91, 655.64 and 321.07

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Solution

The fourth proportional to 436.91, 655.64 and 321.07 is: 481.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.91 : 655.64 = 321.07 : x
  2. Step 2: Convert to fraction form
    436.91/655.64 = 321.07/x
  3. Step 3: Cross multiply
    436.91x = 655.64 × 321.07
  4. Step 4: Simplify right side
    436.91x = 210,504.73
  5. Step 5: Solve for x
    x = 210,504.73/436.91
  6. Step 6: Final answer
    x = 481.80

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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.