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Finding the Fourth Proportional to 359.81, 539.80 and 205.74

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Solution

The fourth proportional to 359.81, 539.80 and 205.74 is: 308.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.81 : 539.80 = 205.74 : x
  2. Step 2: Convert to fraction form
    359.81/539.80 = 205.74/x
  3. Step 3: Cross multiply
    359.81x = 539.80 × 205.74
  4. Step 4: Simplify right side
    359.81x = 111,058.45
  5. Step 5: Solve for x
    x = 111,058.45/359.81
  6. Step 6: Final answer
    x = 308.66

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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.