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Finding the Fourth Proportional to 212.24, 292.20 and 191.72

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Solution

The fourth proportional to 212.24, 292.20 and 191.72 is: 263.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.24 : 292.20 = 191.72 : x
  2. Step 2: Convert to fraction form
    212.24/292.20 = 191.72/x
  3. Step 3: Cross multiply
    212.24x = 292.20 × 191.72
  4. Step 4: Simplify right side
    212.24x = 56,020.58
  5. Step 5: Solve for x
    x = 56,020.58/212.24
  6. Step 6: Final answer
    x = 263.95

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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.