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Finding the Fourth Proportional to 211.38, 291.93 and 170.22

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Solution

The fourth proportional to 211.38, 291.93 and 170.22 is: 235.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.38 : 291.93 = 170.22 : x
  2. Step 2: Convert to fraction form
    211.38/291.93 = 170.22/x
  3. Step 3: Cross multiply
    211.38x = 291.93 × 170.22
  4. Step 4: Simplify right side
    211.38x = 49,692.32
  5. Step 5: Solve for x
    x = 49,692.32/211.38
  6. Step 6: Final answer
    x = 235.09

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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.