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Finding the Fourth Proportional to 238.44, 328.91 and 171.98

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Solution

The fourth proportional to 238.44, 328.91 and 171.98 is: 237.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.44 : 328.91 = 171.98 : x
  2. Step 2: Convert to fraction form
    238.44/328.91 = 171.98/x
  3. Step 3: Cross multiply
    238.44x = 328.91 × 171.98
  4. Step 4: Simplify right side
    238.44x = 56,564.08
  5. Step 5: Solve for x
    x = 56,564.08/238.44
  6. Step 6: Final answer
    x = 237.23

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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.