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Finding the Fourth Proportional to 629.03, 939.30 and 513.69

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Solution

The fourth proportional to 629.03, 939.30 and 513.69 is: 767.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.03 : 939.30 = 513.69 : x
  2. Step 2: Convert to fraction form
    629.03/939.30 = 513.69/x
  3. Step 3: Cross multiply
    629.03x = 939.30 × 513.69
  4. Step 4: Simplify right side
    629.03x = 482,514.38
  5. Step 5: Solve for x
    x = 482,514.38/629.03
  6. Step 6: Final answer
    x = 767.08

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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.