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Finding the Third Proportional to 990,484 and 2,138,600

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Solution

The third proportional to 990,484 and 2,138,600 is: 4,617,550.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,484 : 2,138,600 = 2,138,600 : x
  2. Step 2: Convert to fraction form
    990,484/2,138,600 = 2,138,600/x
  3. Step 3: Cross multiply
    990,484x = 2,138,600 × 2,138,600
  4. Step 4: Simplify right side
    990,484x = 4,573,609,960,000
  5. Step 5: Solve for x
    x = 4,573,609,960,000/990,484
  6. Step 6: Final answer
    x = 4,617,550.57

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.