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Finding the Third Proportional to 283.78 and 442.13

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Solution

The third proportional to 283.78 and 442.13 is: 688.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.78 : 442.13 = 442.13 : x
  2. Step 2: Convert to fraction form
    283.78/442.13 = 442.13/x
  3. Step 3: Cross multiply
    283.78x = 442.13 × 442.13
  4. Step 4: Simplify right side
    283.78x = 195,474.52
  5. Step 5: Solve for x
    x = 195,474.52/283.78
  6. Step 6: Final answer
    x = 688.82

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.