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Finding the Fourth Proportional to 629.88, 940.69 and 543.39

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Solution

The fourth proportional to 629.88, 940.69 and 543.39 is: 811.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.88 : 940.69 = 543.39 : x
  2. Step 2: Convert to fraction form
    629.88/940.69 = 543.39/x
  3. Step 3: Cross multiply
    629.88x = 940.69 × 543.39
  4. Step 4: Simplify right side
    629.88x = 511,161.54
  5. Step 5: Solve for x
    x = 511,161.54/629.88
  6. Step 6: Final answer
    x = 811.52

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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.