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Finding the Fourth Proportional to 384.20, 527.35 and 363.69

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Solution

The fourth proportional to 384.20, 527.35 and 363.69 is: 499.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.20 : 527.35 = 363.69 : x
  2. Step 2: Convert to fraction form
    384.20/527.35 = 363.69/x
  3. Step 3: Cross multiply
    384.20x = 527.35 × 363.69
  4. Step 4: Simplify right side
    384.20x = 191,791.92
  5. Step 5: Solve for x
    x = 191,791.92/384.20
  6. Step 6: Final answer
    x = 499.20

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.