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Finding the Third Proportional to 490 and 734.25

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Solution

The third proportional to 490 and 734.25 is: 1,100.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    490 : 734.25 = 734.25 : x
  2. Step 2: Convert to fraction form
    490/734.25 = 734.25/x
  3. Step 3: Cross multiply
    490x = 734.25 × 734.25
  4. Step 4: Simplify right side
    490x = 539,123.06
  5. Step 5: Solve for x
    x = 539,123.06/490
  6. Step 6: Final answer
    x = 1,100.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.