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Finding the Third Proportional to 3,220 and 5,490

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Solution

The third proportional to 3,220 and 5,490 is: 9,360.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,220 : 5,490 = 5,490 : x
  2. Step 2: Convert to fraction form
    3,220/5,490 = 5,490/x
  3. Step 3: Cross multiply
    3,220x = 5,490 × 5,490
  4. Step 4: Simplify right side
    3,220x = 30,140,100
  5. Step 5: Solve for x
    x = 30,140,100/3,220
  6. Step 6: Final answer
    x = 9,360.28

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Why These Related Problems?

These problems maintain the same ratio (1.70) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.