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Finding the Fourth Proportional to 1,328,012,957.80, 1,992,019,436.70 and 940,273,604.20

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Solution

The fourth proportional to 1,328,012,957.80, 1,992,019,436.70 and 940,273,604.20 is: 1,410,410,406.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328,012,957.80 : 1,992,019,436.70 = 940,273,604.20 : x
  2. Step 2: Convert to fraction form
    1,328,012,957.80/1,992,019,436.70 = 940,273,604.20/x
  3. Step 3: Cross multiply
    1,328,012,957.80x = 1,992,019,436.70 × 940,273,604.20
  4. Step 4: Simplify right side
    1,328,012,957.80x = 1,873,043,295,382,362,880
  5. Step 5: Solve for x
    x = 1,873,043,295,382,362,880/1,328,012,957.80
  6. Step 6: Final answer
    x = 1,410,410,406.30

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Double scale
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Similar ratio
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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.