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Finding the Fourth Proportional to 290.16, 399.96 and 243.44

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Solution

The fourth proportional to 290.16, 399.96 and 243.44 is: 335.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.16 : 399.96 = 243.44 : x
  2. Step 2: Convert to fraction form
    290.16/399.96 = 243.44/x
  3. Step 3: Cross multiply
    290.16x = 399.96 × 243.44
  4. Step 4: Simplify right side
    290.16x = 97,366.26
  5. Step 5: Solve for x
    x = 97,366.26/290.16
  6. Step 6: Final answer
    x = 335.56

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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.