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Finding the Third Proportional to 3,215,430 and 6,990,156

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Solution

The third proportional to 3,215,430 and 6,990,156 is: 15,196,188.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215,430 : 6,990,156 = 6,990,156 : x
  2. Step 2: Convert to fraction form
    3,215,430/6,990,156 = 6,990,156/x
  3. Step 3: Cross multiply
    3,215,430x = 6,990,156 × 6,990,156
  4. Step 4: Simplify right side
    3,215,430x = 48,862,280,904,336
  5. Step 5: Solve for x
    x = 48,862,280,904,336/3,215,430
  6. Step 6: Final answer
    x = 15,196,188.66

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.