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Finding the Third Proportional to 3,640 and 7,492

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Solution

The third proportional to 3,640 and 7,492 is: 15,420.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,640 : 7,492 = 7,492 : x
  2. Step 2: Convert to fraction form
    3,640/7,492 = 7,492/x
  3. Step 3: Cross multiply
    3,640x = 7,492 × 7,492
  4. Step 4: Simplify right side
    3,640x = 56,130,064
  5. Step 5: Solve for x
    x = 56,130,064/3,640
  6. Step 6: Final answer
    x = 15,420.35

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.