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Finding the Third Proportional to 644.06 and 783.56

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Solution

The third proportional to 644.06 and 783.56 is: 953.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.06 : 783.56 = 783.56 : x
  2. Step 2: Convert to fraction form
    644.06/783.56 = 783.56/x
  3. Step 3: Cross multiply
    644.06x = 783.56 × 783.56
  4. Step 4: Simplify right side
    644.06x = 613,970.19
  5. Step 5: Solve for x
    x = 613,970.19/644.06
  6. Step 6: Final answer
    x = 953.28

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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.