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Finding the Fourth Proportional to 1,379,986,908.48, 1,904,548,930.56 and 785,415,960

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Solution

The fourth proportional to 1,379,986,908.48, 1,904,548,930.56 and 785,415,960 is: 1,083,969,070.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,379,986,908.48 : 1,904,548,930.56 = 785,415,960 : x
  2. Step 2: Convert to fraction form
    1,379,986,908.48/1,904,548,930.56 = 785,415,960/x
  3. Step 3: Cross multiply
    1,379,986,908.48x = 1,904,548,930.56 × 785,415,960
  4. Step 4: Simplify right side
    1,379,986,908.48x = 1,495,863,126,662,755,584
  5. Step 5: Solve for x
    x = 1,495,863,126,662,755,584/1,379,986,908.48
  6. Step 6: Final answer
    x = 1,083,969,070.63

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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.