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Finding the Third Proportional to 398,865,930 and 612,706,905

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Solution

The third proportional to 398,865,930 and 612,706,905 is: 941,192,824.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,865,930 : 612,706,905 = 612,706,905 : x
  2. Step 2: Convert to fraction form
    398,865,930/612,706,905 = 612,706,905/x
  3. Step 3: Cross multiply
    398,865,930x = 612,706,905 × 612,706,905
  4. Step 4: Simplify right side
    398,865,930x = 375,409,751,434,679,040
  5. Step 5: Solve for x
    x = 375,409,751,434,679,040/398,865,930
  6. Step 6: Final answer
    x = 941,192,824.95

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.