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Finding the Fourth Proportional to 629.70, 942.12 and 628.08

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Solution

The fourth proportional to 629.70, 942.12 and 628.08 is: 939.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.70 : 942.12 = 628.08 : x
  2. Step 2: Convert to fraction form
    629.70/942.12 = 628.08/x
  3. Step 3: Cross multiply
    629.70x = 942.12 × 628.08
  4. Step 4: Simplify right side
    629.70x = 591,726.73
  5. Step 5: Solve for x
    x = 591,726.73/629.70
  6. Step 6: Final answer
    x = 939.70

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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.