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Finding the Fourth Proportional to 511.45, 765.79 and 267.46

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Solution

The fourth proportional to 511.45, 765.79 and 267.46 is: 400.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    511.45 : 765.79 = 267.46 : x
  2. Step 2: Convert to fraction form
    511.45/765.79 = 267.46/x
  3. Step 3: Cross multiply
    511.45x = 765.79 × 267.46
  4. Step 4: Simplify right side
    511.45x = 204,818.19
  5. Step 5: Solve for x
    x = 204,818.19/511.45
  6. Step 6: Final answer
    x = 400.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.