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Finding the Fourth Proportional to 341.11, 511.20 and 211.09

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Solution

The fourth proportional to 341.11, 511.20 and 211.09 is: 316.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    341.11 : 511.20 = 211.09 : x
  2. Step 2: Convert to fraction form
    341.11/511.20 = 211.09/x
  3. Step 3: Cross multiply
    341.11x = 511.20 × 211.09
  4. Step 4: Simplify right side
    341.11x = 107,909.21
  5. Step 5: Solve for x
    x = 107,909.21/341.11
  6. Step 6: Final answer
    x = 316.35

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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.