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Finding the Fourth Proportional to 628.97, 944.66 and 398.12

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Solution

The fourth proportional to 628.97, 944.66 and 398.12 is: 597.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.97 : 944.66 = 398.12 : x
  2. Step 2: Convert to fraction form
    628.97/944.66 = 398.12/x
  3. Step 3: Cross multiply
    628.97x = 944.66 × 398.12
  4. Step 4: Simplify right side
    628.97x = 376,084.31
  5. Step 5: Solve for x
    x = 376,084.31/628.97
  6. Step 6: Final answer
    x = 597.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.