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Finding the Third Proportional to 291,438,405 and 631,304,442

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Solution

The third proportional to 291,438,405 and 631,304,442 is: 1,367,511,253.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,438,405 : 631,304,442 = 631,304,442 : x
  2. Step 2: Convert to fraction form
    291,438,405/631,304,442 = 631,304,442/x
  3. Step 3: Cross multiply
    291,438,405x = 631,304,442 × 631,304,442
  4. Step 4: Simplify right side
    291,438,405x = 398,545,298,488,931,392
  5. Step 5: Solve for x
    x = 398,545,298,488,931,392/291,438,405
  6. Step 6: Final answer
    x = 1,367,511,253.33

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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.