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Finding the Fourth Proportional to 274.76, 412.39 and 172.25

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Solution

The fourth proportional to 274.76, 412.39 and 172.25 is: 258.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.76 : 412.39 = 172.25 : x
  2. Step 2: Convert to fraction form
    274.76/412.39 = 172.25/x
  3. Step 3: Cross multiply
    274.76x = 412.39 × 172.25
  4. Step 4: Simplify right side
    274.76x = 71,032.91
  5. Step 5: Solve for x
    x = 71,032.91/274.76
  6. Step 6: Final answer
    x = 258.52

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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.