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Finding the Fourth Proportional to 628.30, 943.26 and 396.55

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Solution

The fourth proportional to 628.30, 943.26 and 396.55 is: 595.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.30 : 943.26 = 396.55 : x
  2. Step 2: Convert to fraction form
    628.30/943.26 = 396.55/x
  3. Step 3: Cross multiply
    628.30x = 943.26 × 396.55
  4. Step 4: Simplify right side
    628.30x = 374,049.75
  5. Step 5: Solve for x
    x = 374,049.75/628.30
  6. Step 6: Final answer
    x = 595.34

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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.