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Finding the Fourth Proportional to 211.86, 292.11 and 146.28

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Solution

The fourth proportional to 211.86, 292.11 and 146.28 is: 201.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.86 : 292.11 = 146.28 : x
  2. Step 2: Convert to fraction form
    211.86/292.11 = 146.28/x
  3. Step 3: Cross multiply
    211.86x = 292.11 × 146.28
  4. Step 4: Simplify right side
    211.86x = 42,729.85
  5. Step 5: Solve for x
    x = 42,729.85/211.86
  6. Step 6: Final answer
    x = 201.69

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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.