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Finding the Fourth Proportional to 172.38, 258.33 and 146.94

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Solution

The fourth proportional to 172.38, 258.33 and 146.94 is: 220.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    172.38 : 258.33 = 146.94 : x
  2. Step 2: Convert to fraction form
    172.38/258.33 = 146.94/x
  3. Step 3: Cross multiply
    172.38x = 258.33 × 146.94
  4. Step 4: Simplify right side
    172.38x = 37,959.01
  5. Step 5: Solve for x
    x = 37,959.01/172.38
  6. Step 6: Final answer
    x = 220.21

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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.