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Finding the Fourth Proportional to 195.26, 291.45 and 172.20

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Solution

The fourth proportional to 195.26, 291.45 and 172.20 is: 257.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    195.26 : 291.45 = 172.20 : x
  2. Step 2: Convert to fraction form
    195.26/291.45 = 172.20/x
  3. Step 3: Cross multiply
    195.26x = 291.45 × 172.20
  4. Step 4: Simplify right side
    195.26x = 50,187.64
  5. Step 5: Solve for x
    x = 50,187.64/195.26
  6. Step 6: Final answer
    x = 257.03

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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.