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Finding the Fourth Proportional to 290.34, 400.62 and 197.19

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Solution

The fourth proportional to 290.34, 400.62 and 197.19 is: 272.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.34 : 400.62 = 197.19 : x
  2. Step 2: Convert to fraction form
    290.34/400.62 = 197.19/x
  3. Step 3: Cross multiply
    290.34x = 400.62 × 197.19
  4. Step 4: Simplify right side
    290.34x = 78,998.26
  5. Step 5: Solve for x
    x = 78,998.26/290.34
  6. Step 6: Final answer
    x = 272.09

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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.