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Finding the Fourth Proportional to 436.14, 654.81 and 321.30

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Solution

The fourth proportional to 436.14, 654.81 and 321.30 is: 482.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.14 : 654.81 = 321.30 : x
  2. Step 2: Convert to fraction form
    436.14/654.81 = 321.30/x
  3. Step 3: Cross multiply
    436.14x = 654.81 × 321.30
  4. Step 4: Simplify right side
    436.14x = 210,390.45
  5. Step 5: Solve for x
    x = 210,390.45/436.14
  6. Step 6: Final answer
    x = 482.39

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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.