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Finding the Fourth Proportional to 211.32, 318.59 and 191.73

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Solution

The fourth proportional to 211.32, 318.59 and 191.73 is: 289.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.32 : 318.59 = 191.73 : x
  2. Step 2: Convert to fraction form
    211.32/318.59 = 191.73/x
  3. Step 3: Cross multiply
    211.32x = 318.59 × 191.73
  4. Step 4: Simplify right side
    211.32x = 61,083.26
  5. Step 5: Solve for x
    x = 61,083.26/211.32
  6. Step 6: Final answer
    x = 289.06

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.