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Finding the Third Proportional to 4,239 and 5,724

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Solution

The third proportional to 4,239 and 5,724 is: 7,729.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,239 : 5,724 = 5,724 : x
  2. Step 2: Convert to fraction form
    4,239/5,724 = 5,724/x
  3. Step 3: Cross multiply
    4,239x = 5,724 × 5,724
  4. Step 4: Simplify right side
    4,239x = 32,764,176
  5. Step 5: Solve for x
    x = 32,764,176/4,239
  6. Step 6: Final answer
    x = 7,729.22

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.