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Finding the Third Proportional to 289.41 and 619.31

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Solution

The third proportional to 289.41 and 619.31 is: 1,325.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    289.41 : 619.31 = 619.31 : x
  2. Step 2: Convert to fraction form
    289.41/619.31 = 619.31/x
  3. Step 3: Cross multiply
    289.41x = 619.31 × 619.31
  4. Step 4: Simplify right side
    289.41x = 383,547.97
  5. Step 5: Solve for x
    x = 383,547.97/289.41
  6. Step 6: Final answer
    x = 1,325.29

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.