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Finding the Fourth Proportional to 172.31, 258.47 and 44.06

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Solution

The fourth proportional to 172.31, 258.47 and 44.06 is: 66.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.31 : 258.47 = 44.06 : x
  2. Step 2: Convert to fraction form
    172.31/258.47 = 44.06/x
  3. Step 3: Cross multiply
    172.31x = 258.47 × 44.06
  4. Step 4: Simplify right side
    172.31x = 11,388.94
  5. Step 5: Solve for x
    x = 11,388.94/172.31
  6. Step 6: Final answer
    x = 66.09

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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.