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Finding the Fourth Proportional to 211.48, 291.79 and 133.87

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Solution

The fourth proportional to 211.48, 291.79 and 133.87 is: 184.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.48 : 291.79 = 133.87 : x
  2. Step 2: Convert to fraction form
    211.48/291.79 = 133.87/x
  3. Step 3: Cross multiply
    211.48x = 291.79 × 133.87
  4. Step 4: Simplify right side
    211.48x = 39,061.93
  5. Step 5: Solve for x
    x = 39,061.93/211.48
  6. Step 6: Final answer
    x = 184.71

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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.