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Finding the Fourth Proportional to 275.63, 380.36 and 172.13

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Solution

The fourth proportional to 275.63, 380.36 and 172.13 is: 237.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.63 : 380.36 = 172.13 : x
  2. Step 2: Convert to fraction form
    275.63/380.36 = 172.13/x
  3. Step 3: Cross multiply
    275.63x = 380.36 × 172.13
  4. Step 4: Simplify right side
    275.63x = 65,469.90
  5. Step 5: Solve for x
    x = 65,469.90/275.63
  6. Step 6: Final answer
    x = 237.53

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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.