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Finding the Fourth Proportional to 359.78, 539.19 and 186.30

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Solution

The fourth proportional to 359.78, 539.19 and 186.30 is: 279.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.78 : 539.19 = 186.30 : x
  2. Step 2: Convert to fraction form
    359.78/539.19 = 186.30/x
  3. Step 3: Cross multiply
    359.78x = 539.19 × 186.30
  4. Step 4: Simplify right side
    359.78x = 100,451.10
  5. Step 5: Solve for x
    x = 100,451.10/359.78
  6. Step 6: Final answer
    x = 279.21

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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.