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Finding the Fourth Proportional to 1,372,187,975.54, 1,893,476,859.32 and 807,639,188.78

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Solution

The fourth proportional to 1,372,187,975.54, 1,893,476,859.32 and 807,639,188.78 is: 1,114,458,180.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,372,187,975.54 : 1,893,476,859.32 = 807,639,188.78 : x
  2. Step 2: Convert to fraction form
    1,372,187,975.54/1,893,476,859.32 = 807,639,188.78/x
  3. Step 3: Cross multiply
    1,372,187,975.54x = 1,893,476,859.32 × 807,639,188.78
  4. Step 4: Simplify right side
    1,372,187,975.54x = 1,529,246,114,641,659,904
  5. Step 5: Solve for x
    x = 1,529,246,114,641,659,904/1,372,187,975.54
  6. Step 6: Final answer
    x = 1,114,458,180.59

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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.