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Finding the Fourth Proportional to 211.33, 291.77 and 201.48

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Solution

The fourth proportional to 211.33, 291.77 and 201.48 is: 278.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.33 : 291.77 = 201.48 : x
  2. Step 2: Convert to fraction form
    211.33/291.77 = 201.48/x
  3. Step 3: Cross multiply
    211.33x = 291.77 × 201.48
  4. Step 4: Simplify right side
    211.33x = 58,785.82
  5. Step 5: Solve for x
    x = 58,785.82/211.33
  6. Step 6: Final answer
    x = 278.17

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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.