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Finding the Third Proportional to 619.75 and 903.75

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Solution

The third proportional to 619.75 and 903.75 is: 1,317.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.75 : 903.75 = 903.75 : x
  2. Step 2: Convert to fraction form
    619.75/903.75 = 903.75/x
  3. Step 3: Cross multiply
    619.75x = 903.75 × 903.75
  4. Step 4: Simplify right side
    619.75x = 816,764.06
  5. Step 5: Solve for x
    x = 816,764.06/619.75
  6. Step 6: Final answer
    x = 1,317.89

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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.