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Finding the Fourth Proportional to 3,879,640.78, 5,819,461.24 and 1,183,979.82

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Solution

The fourth proportional to 3,879,640.78, 5,819,461.24 and 1,183,979.82 is: 1,775,969.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879,640.78 : 5,819,461.24 = 1,183,979.82 : x
  2. Step 2: Convert to fraction form
    3,879,640.78/5,819,461.24 = 1,183,979.82/x
  3. Step 3: Cross multiply
    3,879,640.78x = 5,819,461.24 × 1,183,979.82
  4. Step 4: Simplify right side
    3,879,640.78x = 6,890,124,671,432.18
  5. Step 5: Solve for x
    x = 6,890,124,671,432.18/3,879,640.78
  6. Step 6: Final answer
    x = 1,775,969.75

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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.