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Finding the Fourth Proportional to 359.50, 496.12 and 221.50

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Solution

The fourth proportional to 359.50, 496.12 and 221.50 is: 305.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    359.50 : 496.12 = 221.50 : x
  2. Step 2: Convert to fraction form
    359.50/496.12 = 221.50/x
  3. Step 3: Cross multiply
    359.50x = 496.12 × 221.50
  4. Step 4: Simplify right side
    359.50x = 109,890.58
  5. Step 5: Solve for x
    x = 109,890.58/359.50
  6. Step 6: Final answer
    x = 305.68

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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.