Home / 445,659,876-615,012,857.20-278,493,206.76

Finding the Fourth Proportional to 445,659,876, 615,012,857.20 and 278,493,206.76

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Solution

The fourth proportional to 445,659,876, 615,012,857.20 and 278,493,206.76 is: 384,322,017.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,659,876 : 615,012,857.20 = 278,493,206.76 : x
  2. Step 2: Convert to fraction form
    445,659,876/615,012,857.20 = 278,493,206.76/x
  3. Step 3: Cross multiply
    445,659,876x = 615,012,857.20 × 278,493,206.76
  4. Step 4: Simplify right side
    445,659,876x = 171,276,902,800,257,952
  5. Step 5: Solve for x
    x = 171,276,902,800,257,952/445,659,876
  6. Step 6: Final answer
    x = 384,322,017.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.