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Finding the Fourth Proportional to 438.28, 603.79 and 363.31

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Solution

The fourth proportional to 438.28, 603.79 and 363.31 is: 500.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.28 : 603.79 = 363.31 : x
  2. Step 2: Convert to fraction form
    438.28/603.79 = 363.31/x
  3. Step 3: Cross multiply
    438.28x = 603.79 × 363.31
  4. Step 4: Simplify right side
    438.28x = 219,362.94
  5. Step 5: Solve for x
    x = 219,362.94/438.28
  6. Step 6: Final answer
    x = 500.51

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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.