Home / 1,321,689,220.26-1,982,318,359.95-388,793,893.80

Finding the Fourth Proportional to 1,321,689,220.26, 1,982,318,359.95 and 388,793,893.80

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Solution

The fourth proportional to 1,321,689,220.26, 1,982,318,359.95 and 388,793,893.80 is: 583,127,456.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,689,220.26 : 1,982,318,359.95 = 388,793,893.80 : x
  2. Step 2: Convert to fraction form
    1,321,689,220.26/1,982,318,359.95 = 388,793,893.80/x
  3. Step 3: Cross multiply
    1,321,689,220.26x = 1,982,318,359.95 × 388,793,893.80
  4. Step 4: Simplify right side
    1,321,689,220.26x = 770,713,273,916,190,464
  5. Step 5: Solve for x
    x = 770,713,273,916,190,464/1,321,689,220.26
  6. Step 6: Final answer
    x = 583,127,456.97

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Double scale
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1.5x scale

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.