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Finding the Fourth Proportional to 340.76, 512.28 and 269.48

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Solution

The fourth proportional to 340.76, 512.28 and 269.48 is: 405.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.76 : 512.28 = 269.48 : x
  2. Step 2: Convert to fraction form
    340.76/512.28 = 269.48/x
  3. Step 3: Cross multiply
    340.76x = 512.28 × 269.48
  4. Step 4: Simplify right side
    340.76x = 138,049.21
  5. Step 5: Solve for x
    x = 138,049.21/340.76
  6. Step 6: Final answer
    x = 405.12

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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.