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Finding the Third Proportional to 402,920,979 and 876,780,372

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Solution

The third proportional to 402,920,979 and 876,780,372 is: 1,907,927,014.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,920,979 : 876,780,372 = 876,780,372 : x
  2. Step 2: Convert to fraction form
    402,920,979/876,780,372 = 876,780,372/x
  3. Step 3: Cross multiply
    402,920,979x = 876,780,372 × 876,780,372
  4. Step 4: Simplify right side
    402,920,979x = 768,743,820,724,458,368
  5. Step 5: Solve for x
    x = 768,743,820,724,458,368/402,920,979
  6. Step 6: Final answer
    x = 1,907,927,014.95

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These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.