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Finding the Fourth Proportional to 359.61, 539.57 and 279.15

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Solution

The fourth proportional to 359.61, 539.57 and 279.15 is: 418.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.61 : 539.57 = 279.15 : x
  2. Step 2: Convert to fraction form
    359.61/539.57 = 279.15/x
  3. Step 3: Cross multiply
    359.61x = 539.57 × 279.15
  4. Step 4: Simplify right side
    359.61x = 150,620.97
  5. Step 5: Solve for x
    x = 150,620.97/359.61
  6. Step 6: Final answer
    x = 418.85

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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.