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Finding the Fourth Proportional to 359.80, 539.30 and 197.60

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Solution

The fourth proportional to 359.80, 539.30 and 197.60 is: 296.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.80 : 539.30 = 197.60 : x
  2. Step 2: Convert to fraction form
    359.80/539.30 = 197.60/x
  3. Step 3: Cross multiply
    359.80x = 539.30 × 197.60
  4. Step 4: Simplify right side
    359.80x = 106,565.68
  5. Step 5: Solve for x
    x = 106,565.68/359.80
  6. Step 6: Final answer
    x = 296.18

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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.