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Finding the Third Proportional to 644.06 and 859.50

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Solution

The third proportional to 644.06 and 859.50 is: 1,147.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    644.06 : 859.50 = 859.50 : x
  2. Step 2: Convert to fraction form
    644.06/859.50 = 859.50/x
  3. Step 3: Cross multiply
    644.06x = 859.50 × 859.50
  4. Step 4: Simplify right side
    644.06x = 738,740.25
  5. Step 5: Solve for x
    x = 738,740.25/644.06
  6. Step 6: Final answer
    x = 1,147.00

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.