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Finding the Third Proportional to 3,128.63 and 4,685.34

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Solution

The third proportional to 3,128.63 and 4,685.34 is: 7,016.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.63 : 4,685.34 = 4,685.34 : x
  2. Step 2: Convert to fraction form
    3,128.63/4,685.34 = 4,685.34/x
  3. Step 3: Cross multiply
    3,128.63x = 4,685.34 × 4,685.34
  4. Step 4: Simplify right side
    3,128.63x = 21,952,446.06
  5. Step 5: Solve for x
    x = 21,952,446.06/3,128.63
  6. Step 6: Final answer
    x = 7,016.64

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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.