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Finding the Third Proportional to 3,490 and 4,742

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Solution

The third proportional to 3,490 and 4,742 is: 6,443.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,490 : 4,742 = 4,742 : x
  2. Step 2: Convert to fraction form
    3,490/4,742 = 4,742/x
  3. Step 3: Cross multiply
    3,490x = 4,742 × 4,742
  4. Step 4: Simplify right side
    3,490x = 22,486,564
  5. Step 5: Solve for x
    x = 22,486,564/3,490
  6. Step 6: Final answer
    x = 6,443.14

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.