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Finding the Fourth Proportional to 630.37, 869.97 and 394.39

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Solution

The fourth proportional to 630.37, 869.97 and 394.39 is: 544.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    630.37 : 869.97 = 394.39 : x
  2. Step 2: Convert to fraction form
    630.37/869.97 = 394.39/x
  3. Step 3: Cross multiply
    630.37x = 869.97 × 394.39
  4. Step 4: Simplify right side
    630.37x = 343,107.47
  5. Step 5: Solve for x
    x = 343,107.47/630.37
  6. Step 6: Final answer
    x = 544.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.