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Finding the Third Proportional to 285.75 and 427.03

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Solution

The third proportional to 285.75 and 427.03 is: 638.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.75 : 427.03 = 427.03 : x
  2. Step 2: Convert to fraction form
    285.75/427.03 = 427.03/x
  3. Step 3: Cross multiply
    285.75x = 427.03 × 427.03
  4. Step 4: Simplify right side
    285.75x = 182,355.69
  5. Step 5: Solve for x
    x = 182,355.69/285.75
  6. Step 6: Final answer
    x = 638.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.