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Finding the Fourth Proportional to 290.08, 400.23 and 172.07

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Solution

The fourth proportional to 290.08, 400.23 and 172.07 is: 237.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.08 : 400.23 = 172.07 : x
  2. Step 2: Convert to fraction form
    290.08/400.23 = 172.07/x
  3. Step 3: Cross multiply
    290.08x = 400.23 × 172.07
  4. Step 4: Simplify right side
    290.08x = 68,869.09
  5. Step 5: Solve for x
    x = 68,869.09/290.08
  6. Step 6: Final answer
    x = 237.41

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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.