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Finding the Third Proportional to 421,913,980 and 908,630,245

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Solution

The third proportional to 421,913,980 and 908,630,245 is: 1,956,818,122.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,913,980 : 908,630,245 = 908,630,245 : x
  2. Step 2: Convert to fraction form
    421,913,980/908,630,245 = 908,630,245/x
  3. Step 3: Cross multiply
    421,913,980x = 908,630,245 × 908,630,245
  4. Step 4: Simplify right side
    421,913,980x = 825,608,922,128,760,064
  5. Step 5: Solve for x
    x = 825,608,922,128,760,064/421,913,980
  6. Step 6: Final answer
    x = 1,956,818,122.33

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.