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Finding the Fourth Proportional to 213.74, 295.25 and 172.45

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Solution

The fourth proportional to 213.74, 295.25 and 172.45 is: 238.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    213.74 : 295.25 = 172.45 : x
  2. Step 2: Convert to fraction form
    213.74/295.25 = 172.45/x
  3. Step 3: Cross multiply
    213.74x = 295.25 × 172.45
  4. Step 4: Simplify right side
    213.74x = 50,915.00
  5. Step 5: Solve for x
    x = 50,915.00/213.74
  6. Step 6: Final answer
    x = 238.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.