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Finding the Third Proportional to 305.44 and 442.13

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Solution

The third proportional to 305.44 and 442.13 is: 639.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    305.44 : 442.13 = 442.13 : x
  2. Step 2: Convert to fraction form
    305.44/442.13 = 442.13/x
  3. Step 3: Cross multiply
    305.44x = 442.13 × 442.13
  4. Step 4: Simplify right side
    305.44x = 195,474.52
  5. Step 5: Solve for x
    x = 195,474.52/305.44
  6. Step 6: Final answer
    x = 639.98

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.