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Finding the Fourth Proportional to 290.33, 400.55 and 190.71

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Solution

The fourth proportional to 290.33, 400.55 and 190.71 is: 263.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.33 : 400.55 = 190.71 : x
  2. Step 2: Convert to fraction form
    290.33/400.55 = 190.71/x
  3. Step 3: Cross multiply
    290.33x = 400.55 × 190.71
  4. Step 4: Simplify right side
    290.33x = 76,387.94
  5. Step 5: Solve for x
    x = 76,387.94/290.33
  6. Step 6: Final answer
    x = 263.11

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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.