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Finding the Fourth Proportional to 251.12, 346.23 and 172.28

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Solution

The fourth proportional to 251.12, 346.23 and 172.28 is: 237.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    251.12 : 346.23 = 172.28 : x
  2. Step 2: Convert to fraction form
    251.12/346.23 = 172.28/x
  3. Step 3: Cross multiply
    251.12x = 346.23 × 172.28
  4. Step 4: Simplify right side
    251.12x = 59,646.77
  5. Step 5: Solve for x
    x = 59,646.77/251.12
  6. Step 6: Final answer
    x = 237.53

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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.