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Finding the Third Proportional to 388,560,990 and 634,417,956

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Solution

The third proportional to 388,560,990 and 634,417,956 is: 1,035,837,753.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,560,990 : 634,417,956 = 634,417,956 : x
  2. Step 2: Convert to fraction form
    388,560,990/634,417,956 = 634,417,956/x
  3. Step 3: Cross multiply
    388,560,990x = 634,417,956 × 634,417,956
  4. Step 4: Simplify right side
    388,560,990x = 402,486,142,895,217,920
  5. Step 5: Solve for x
    x = 402,486,142,895,217,920/388,560,990
  6. Step 6: Final answer
    x = 1,035,837,753.28

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Why These Related Problems?

These problems maintain the same ratio (1.63) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.