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Finding the Fourth Proportional to 211.15, 290.75 and 174.24

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Solution

The fourth proportional to 211.15, 290.75 and 174.24 is: 239.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    211.15 : 290.75 = 174.24 : x
  2. Step 2: Convert to fraction form
    211.15/290.75 = 174.24/x
  3. Step 3: Cross multiply
    211.15x = 290.75 × 174.24
  4. Step 4: Simplify right side
    211.15x = 50,660.28
  5. Step 5: Solve for x
    x = 50,660.28/211.15
  6. Step 6: Final answer
    x = 239.93

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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.