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Finding the Third Proportional to 285.63 and 347.75

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Solution

The third proportional to 285.63 and 347.75 is: 423.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.63 : 347.75 = 347.75 : x
  2. Step 2: Convert to fraction form
    285.63/347.75 = 347.75/x
  3. Step 3: Cross multiply
    285.63x = 347.75 × 347.75
  4. Step 4: Simplify right side
    285.63x = 120,930.06
  5. Step 5: Solve for x
    x = 120,930.06/285.63
  6. Step 6: Final answer
    x = 423.39

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Why These Related Problems?

These problems maintain the same ratio (1.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.