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Finding the Third Proportional to 443,649,919 and 689,668,472

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Solution

The third proportional to 443,649,919 and 689,668,472 is: 1,072,112,449.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,649,919 : 689,668,472 = 689,668,472 : x
  2. Step 2: Convert to fraction form
    443,649,919/689,668,472 = 689,668,472/x
  3. Step 3: Cross multiply
    443,649,919x = 689,668,472 × 689,668,472
  4. Step 4: Simplify right side
    443,649,919x = 475,642,601,270,814,784
  5. Step 5: Solve for x
    x = 475,642,601,270,814,784/443,649,919
  6. Step 6: Final answer
    x = 1,072,112,449.25

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.