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Finding the Fourth Proportional to 367.19, 550.79 and 172.13

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Solution

The fourth proportional to 367.19, 550.79 and 172.13 is: 258.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    367.19 : 550.79 = 172.13 : x
  2. Step 2: Convert to fraction form
    367.19/550.79 = 172.13/x
  3. Step 3: Cross multiply
    367.19x = 550.79 × 172.13
  4. Step 4: Simplify right side
    367.19x = 94,809.29
  5. Step 5: Solve for x
    x = 94,809.29/367.19
  6. Step 6: Final answer
    x = 258.21

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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.