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Finding the Third Proportional to 215,891,521 and 315,740,374

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Solution

The third proportional to 215,891,521 and 315,740,374 is: 461,768,870.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,891,521 : 315,740,374 = 315,740,374 : x
  2. Step 2: Convert to fraction form
    215,891,521/315,740,374 = 315,740,374/x
  3. Step 3: Cross multiply
    215,891,521x = 315,740,374 × 315,740,374
  4. Step 4: Simplify right side
    215,891,521x = 99,691,983,773,659,872
  5. Step 5: Solve for x
    x = 99,691,983,773,659,872/215,891,521
  6. Step 6: Final answer
    x = 461,768,870.37

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.