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Finding the Fourth Proportional to 535.42, 738.28 and 439.31

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Solution

The fourth proportional to 535.42, 738.28 and 439.31 is: 605.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.42 : 738.28 = 439.31 : x
  2. Step 2: Convert to fraction form
    535.42/738.28 = 439.31/x
  3. Step 3: Cross multiply
    535.42x = 738.28 × 439.31
  4. Step 4: Simplify right side
    535.42x = 324,331.59
  5. Step 5: Solve for x
    x = 324,331.59/535.42
  6. Step 6: Final answer
    x = 605.76

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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.