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Finding the Fourth Proportional to 290.24, 400.49 and 172.17

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Solution

The fourth proportional to 290.24, 400.49 and 172.17 is: 237.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.24 : 400.49 = 172.17 : x
  2. Step 2: Convert to fraction form
    290.24/400.49 = 172.17/x
  3. Step 3: Cross multiply
    290.24x = 400.49 × 172.17
  4. Step 4: Simplify right side
    290.24x = 68,951.50
  5. Step 5: Solve for x
    x = 68,951.50/290.24
  6. Step 6: Final answer
    x = 237.57

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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.