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Finding the Fourth Proportional to 538.29, 806.89 and 172.81

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Solution

The fourth proportional to 538.29, 806.89 and 172.81 is: 259.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.29 : 806.89 = 172.81 : x
  2. Step 2: Convert to fraction form
    538.29/806.89 = 172.81/x
  3. Step 3: Cross multiply
    538.29x = 806.89 × 172.81
  4. Step 4: Simplify right side
    538.29x = 139,438.66
  5. Step 5: Solve for x
    x = 139,438.66/538.29
  6. Step 6: Final answer
    x = 259.04

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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.