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Finding the Third Proportional to 290.25 and 442.13

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Solution

The third proportional to 290.25 and 442.13 is: 673.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.25 : 442.13 = 442.13 : x
  2. Step 2: Convert to fraction form
    290.25/442.13 = 442.13/x
  3. Step 3: Cross multiply
    290.25x = 442.13 × 442.13
  4. Step 4: Simplify right side
    290.25x = 195,474.52
  5. Step 5: Solve for x
    x = 195,474.52/290.25
  6. Step 6: Final answer
    x = 673.47

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.