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Finding the Fourth Proportional to 438.54, 604.35 and 385.62

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Solution

The fourth proportional to 438.54, 604.35 and 385.62 is: 531.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    438.54 : 604.35 = 385.62 : x
  2. Step 2: Convert to fraction form
    438.54/604.35 = 385.62/x
  3. Step 3: Cross multiply
    438.54x = 604.35 × 385.62
  4. Step 4: Simplify right side
    438.54x = 233,049.45
  5. Step 5: Solve for x
    x = 233,049.45/438.54
  6. Step 6: Final answer
    x = 531.42

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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.