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Finding the Third Proportional to 3,128 and 5,328

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Solution

The third proportional to 3,128 and 5,328 is: 9,075.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128 : 5,328 = 5,328 : x
  2. Step 2: Convert to fraction form
    3,128/5,328 = 5,328/x
  3. Step 3: Cross multiply
    3,128x = 5,328 × 5,328
  4. Step 4: Simplify right side
    3,128x = 28,387,584
  5. Step 5: Solve for x
    x = 28,387,584/3,128
  6. Step 6: Final answer
    x = 9,075.31

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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.