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Finding the Fourth Proportional to 1,283,640.95, 1,922,693.22 and 1,208,183.57

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Solution

The fourth proportional to 1,283,640.95, 1,922,693.22 and 1,208,183.57 is: 1,809,669.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,283,640.95 : 1,922,693.22 = 1,208,183.57 : x
  2. Step 2: Convert to fraction form
    1,283,640.95/1,922,693.22 = 1,208,183.57/x
  3. Step 3: Cross multiply
    1,283,640.95x = 1,922,693.22 × 1,208,183.57
  4. Step 4: Simplify right side
    1,283,640.95x = 2,322,966,358,554.40
  5. Step 5: Solve for x
    x = 2,322,966,358,554.40/1,283,640.95
  6. Step 6: Final answer
    x = 1,809,669.88

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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.