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Finding the Fourth Proportional to 535.41, 738.86 and 311.31

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Solution

The fourth proportional to 535.41, 738.86 and 311.31 is: 429.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    535.41 : 738.86 = 311.31 : x
  2. Step 2: Convert to fraction form
    535.41/738.86 = 311.31/x
  3. Step 3: Cross multiply
    535.41x = 738.86 × 311.31
  4. Step 4: Simplify right side
    535.41x = 230,012.95
  5. Step 5: Solve for x
    x = 230,012.95/535.41
  6. Step 6: Final answer
    x = 429.60

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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.