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Finding the Fourth Proportional to 674.18, 929.96 and 438.44

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Solution

The fourth proportional to 674.18, 929.96 and 438.44 is: 604.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.18 : 929.96 = 438.44 : x
  2. Step 2: Convert to fraction form
    674.18/929.96 = 438.44/x
  3. Step 3: Cross multiply
    674.18x = 929.96 × 438.44
  4. Step 4: Simplify right side
    674.18x = 407,731.66
  5. Step 5: Solve for x
    x = 407,731.66/674.18
  6. Step 6: Final answer
    x = 604.78

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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.