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Finding the Fourth Proportional to 224.91, 336.05 and 172.56

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Solution

The fourth proportional to 224.91, 336.05 and 172.56 is: 257.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    224.91 : 336.05 = 172.56 : x
  2. Step 2: Convert to fraction form
    224.91/336.05 = 172.56/x
  3. Step 3: Cross multiply
    224.91x = 336.05 × 172.56
  4. Step 4: Simplify right side
    224.91x = 57,989.83
  5. Step 5: Solve for x
    x = 57,989.83/224.91
  6. Step 6: Final answer
    x = 257.84

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.