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Finding the Third Proportional to 372.09 and 782.16

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Solution

The third proportional to 372.09 and 782.16 is: 1,644.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.09 : 782.16 = 782.16 : x
  2. Step 2: Convert to fraction form
    372.09/782.16 = 782.16/x
  3. Step 3: Cross multiply
    372.09x = 782.16 × 782.16
  4. Step 4: Simplify right side
    372.09x = 611,768.40
  5. Step 5: Solve for x
    x = 611,768.40/372.09
  6. Step 6: Final answer
    x = 1,644.12

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.