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Finding the Fourth Proportional to 674.12, 929.97 and 438.14

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Solution

The fourth proportional to 674.12, 929.97 and 438.14 is: 604.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.12 : 929.97 = 438.14 : x
  2. Step 2: Convert to fraction form
    674.12/929.97 = 438.14/x
  3. Step 3: Cross multiply
    674.12x = 929.97 × 438.14
  4. Step 4: Simplify right side
    674.12x = 407,459.38
  5. Step 5: Solve for x
    x = 407,459.38/674.12
  6. Step 6: Final answer
    x = 604.43

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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.