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Finding the Fourth Proportional to 237.78, 356.28 and 172.47

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Solution

The fourth proportional to 237.78, 356.28 and 172.47 is: 258.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    237.78 : 356.28 = 172.47 : x
  2. Step 2: Convert to fraction form
    237.78/356.28 = 172.47/x
  3. Step 3: Cross multiply
    237.78x = 356.28 × 172.47
  4. Step 4: Simplify right side
    237.78x = 61,447.61
  5. Step 5: Solve for x
    x = 61,447.61/237.78
  6. Step 6: Final answer
    x = 258.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.