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Finding the Fourth Proportional to 527.63, 791.60 and 219.43

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Solution

The fourth proportional to 527.63, 791.60 and 219.43 is: 329.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    527.63 : 791.60 = 219.43 : x
  2. Step 2: Convert to fraction form
    527.63/791.60 = 219.43/x
  3. Step 3: Cross multiply
    527.63x = 791.60 × 219.43
  4. Step 4: Simplify right side
    527.63x = 173,700.79
  5. Step 5: Solve for x
    x = 173,700.79/527.63
  6. Step 6: Final answer
    x = 329.21

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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.