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Finding the Third Proportional to 287,855,368 and 420,987,172

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Solution

The third proportional to 287,855,368 and 420,987,172 is: 615,691,832.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,855,368 : 420,987,172 = 420,987,172 : x
  2. Step 2: Convert to fraction form
    287,855,368/420,987,172 = 420,987,172/x
  3. Step 3: Cross multiply
    287,855,368x = 420,987,172 × 420,987,172
  4. Step 4: Simplify right side
    287,855,368x = 177,230,198,988,557,568
  5. Step 5: Solve for x
    x = 177,230,198,988,557,568/287,855,368
  6. Step 6: Final answer
    x = 615,691,832.39

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