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Finding the Fourth Proportional to 290.26, 400.74 and 227.98

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Solution

The fourth proportional to 290.26, 400.74 and 227.98 is: 314.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.26 : 400.74 = 227.98 : x
  2. Step 2: Convert to fraction form
    290.26/400.74 = 227.98/x
  3. Step 3: Cross multiply
    290.26x = 400.74 × 227.98
  4. Step 4: Simplify right side
    290.26x = 91,360.71
  5. Step 5: Solve for x
    x = 91,360.71/290.26
  6. Step 6: Final answer
    x = 314.75

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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.