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Finding the Fourth Proportional to 436.67, 655.45 and 321.24

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Solution

The fourth proportional to 436.67, 655.45 and 321.24 is: 482.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.67 : 655.45 = 321.24 : x
  2. Step 2: Convert to fraction form
    436.67/655.45 = 321.24/x
  3. Step 3: Cross multiply
    436.67x = 655.45 × 321.24
  4. Step 4: Simplify right side
    436.67x = 210,556.76
  5. Step 5: Solve for x
    x = 210,556.76/436.67
  6. Step 6: Final answer
    x = 482.19

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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.