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Finding the Fourth Proportional to 359.35, 539.15 and 115.90

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Solution

The fourth proportional to 359.35, 539.15 and 115.90 is: 173.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.35 : 539.15 = 115.90 : x
  2. Step 2: Convert to fraction form
    359.35/539.15 = 115.90/x
  3. Step 3: Cross multiply
    359.35x = 539.15 × 115.90
  4. Step 4: Simplify right side
    359.35x = 62,486.06
  5. Step 5: Solve for x
    x = 62,486.06/359.35
  6. Step 6: Final answer
    x = 173.88

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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.