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Finding the Third Proportional to 357.31 and 762.63

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Solution

The third proportional to 357.31 and 762.63 is: 1,627.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.31 : 762.63 = 762.63 : x
  2. Step 2: Convert to fraction form
    357.31/762.63 = 762.63/x
  3. Step 3: Cross multiply
    357.31x = 762.63 × 762.63
  4. Step 4: Simplify right side
    357.31x = 581,596.89
  5. Step 5: Solve for x
    x = 581,596.89/357.31
  6. Step 6: Final answer
    x = 1,627.70

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.