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Finding the Third Proportional to 1,484 and 3,240

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Solution

The third proportional to 1,484 and 3,240 is: 7,073.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,484 : 3,240 = 3,240 : x
  2. Step 2: Convert to fraction form
    1,484/3,240 = 3,240/x
  3. Step 3: Cross multiply
    1,484x = 3,240 × 3,240
  4. Step 4: Simplify right side
    1,484x = 10,497,600
  5. Step 5: Solve for x
    x = 10,497,600/1,484
  6. Step 6: Final answer
    x = 7,073.85

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.