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Finding the Fourth Proportional to 359.20, 496.12 and 322.40

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Solution

The fourth proportional to 359.20, 496.12 and 322.40 is: 445.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.20 : 496.12 = 322.40 : x
  2. Step 2: Convert to fraction form
    359.20/496.12 = 322.40/x
  3. Step 3: Cross multiply
    359.20x = 496.12 × 322.40
  4. Step 4: Simplify right side
    359.20x = 159,949.09
  5. Step 5: Solve for x
    x = 159,949.09/359.20
  6. Step 6: Final answer
    x = 445.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.