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Finding the Third Proportional to 619.37 and 905.55

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Solution

The third proportional to 619.37 and 905.55 is: 1,323.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.37 : 905.55 = 905.55 : x
  2. Step 2: Convert to fraction form
    619.37/905.55 = 905.55/x
  3. Step 3: Cross multiply
    619.37x = 905.55 × 905.55
  4. Step 4: Simplify right side
    619.37x = 820,029.29
  5. Step 5: Solve for x
    x = 820,029.29/619.37
  6. Step 6: Final answer
    x = 1,323.98

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.