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Finding the Fourth Proportional to 238.54, 329.12 and 172.93

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Solution

The fourth proportional to 238.54, 329.12 and 172.93 is: 238.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    238.54 : 329.12 = 172.93 : x
  2. Step 2: Convert to fraction form
    238.54/329.12 = 172.93/x
  3. Step 3: Cross multiply
    238.54x = 329.12 × 172.93
  4. Step 4: Simplify right side
    238.54x = 56,913.51
  5. Step 5: Solve for x
    x = 56,913.51/238.54
  6. Step 6: Final answer
    x = 238.60

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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.