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Finding the Fourth Proportional to 340.86, 511.60 and 211.11

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Solution

The fourth proportional to 340.86, 511.60 and 211.11 is: 316.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    340.86 : 511.60 = 211.11 : x
  2. Step 2: Convert to fraction form
    340.86/511.60 = 211.11/x
  3. Step 3: Cross multiply
    340.86x = 511.60 × 211.11
  4. Step 4: Simplify right side
    340.86x = 108,002.82
  5. Step 5: Solve for x
    x = 108,002.82/340.86
  6. Step 6: Final answer
    x = 316.86

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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.