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Finding the Fourth Proportional to 629.24, 939.69 and 622.48

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Solution

The fourth proportional to 629.24, 939.69 and 622.48 is: 929.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.24 : 939.69 = 622.48 : x
  2. Step 2: Convert to fraction form
    629.24/939.69 = 622.48/x
  3. Step 3: Cross multiply
    629.24x = 939.69 × 622.48
  4. Step 4: Simplify right side
    629.24x = 584,938.23
  5. Step 5: Solve for x
    x = 584,938.23/629.24
  6. Step 6: Final answer
    x = 929.59

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.