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Finding the Fourth Proportional to 628.11, 942.30 and 354.42

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Solution

The fourth proportional to 628.11, 942.30 and 354.42 is: 531.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.11 : 942.30 = 354.42 : x
  2. Step 2: Convert to fraction form
    628.11/942.30 = 354.42/x
  3. Step 3: Cross multiply
    628.11x = 942.30 × 354.42
  4. Step 4: Simplify right side
    628.11x = 333,969.97
  5. Step 5: Solve for x
    x = 333,969.97/628.11
  6. Step 6: Final answer
    x = 531.71

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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.