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Finding the Fourth Proportional to 172.71, 257.39 and 167.51

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Solution

The fourth proportional to 172.71, 257.39 and 167.51 is: 249.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.71 : 257.39 = 167.51 : x
  2. Step 2: Convert to fraction form
    172.71/257.39 = 167.51/x
  3. Step 3: Cross multiply
    172.71x = 257.39 × 167.51
  4. Step 4: Simplify right side
    172.71x = 43,113.27
  5. Step 5: Solve for x
    x = 43,113.27/172.71
  6. Step 6: Final answer
    x = 249.63

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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.