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Finding the Fourth Proportional to 495.50, 743.40 and 221.81

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Solution

The fourth proportional to 495.50, 743.40 and 221.81 is: 332.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    495.50 : 743.40 = 221.81 : x
  2. Step 2: Convert to fraction form
    495.50/743.40 = 221.81/x
  3. Step 3: Cross multiply
    495.50x = 743.40 × 221.81
  4. Step 4: Simplify right side
    495.50x = 164,889.84
  5. Step 5: Solve for x
    x = 164,889.84/495.50
  6. Step 6: Final answer
    x = 332.78

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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.