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Finding the Third Proportional to 399,235,130 and 868,770,615

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Solution

The third proportional to 399,235,130 and 868,770,615 is: 1,890,520,960.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,235,130 : 868,770,615 = 868,770,615 : x
  2. Step 2: Convert to fraction form
    399,235,130/868,770,615 = 868,770,615/x
  3. Step 3: Cross multiply
    399,235,130x = 868,770,615 × 868,770,615
  4. Step 4: Simplify right side
    399,235,130x = 754,762,381,487,478,272
  5. Step 5: Solve for x
    x = 754,762,381,487,478,272/399,235,130
  6. Step 6: Final answer
    x = 1,890,520,960.64

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.