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Finding the Fourth Proportional to 359.78, 496.35 and 219.81

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Solution

The fourth proportional to 359.78, 496.35 and 219.81 is: 303.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.78 : 496.35 = 219.81 : x
  2. Step 2: Convert to fraction form
    359.78/496.35 = 219.81/x
  3. Step 3: Cross multiply
    359.78x = 496.35 × 219.81
  4. Step 4: Simplify right side
    359.78x = 109,102.69
  5. Step 5: Solve for x
    x = 109,102.69/359.78
  6. Step 6: Final answer
    x = 303.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.