Home / 386,919,007.80-580,378,511.70-300,719,277.60

Finding the Fourth Proportional to 386,919,007.80, 580,378,511.70 and 300,719,277.60

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Solution

The fourth proportional to 386,919,007.80, 580,378,511.70 and 300,719,277.60 is: 451,078,916.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,919,007.80 : 580,378,511.70 = 300,719,277.60 : x
  2. Step 2: Convert to fraction form
    386,919,007.80/580,378,511.70 = 300,719,277.60/x
  3. Step 3: Cross multiply
    386,919,007.80x = 580,378,511.70 × 300,719,277.60
  4. Step 4: Simplify right side
    386,919,007.80x = 174,531,006,772,987,168
  5. Step 5: Solve for x
    x = 174,531,006,772,987,168/386,919,007.80
  6. Step 6: Final answer
    x = 451,078,916.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.