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Finding the Fourth Proportional to 2,631,186, 3,947,403 and 858,258

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Solution

The fourth proportional to 2,631,186, 3,947,403 and 858,258 is: 1,287,590.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,631,186 : 3,947,403 = 858,258 : x
  2. Step 2: Convert to fraction form
    2,631,186/3,947,403 = 858,258/x
  3. Step 3: Cross multiply
    2,631,186x = 3,947,403 × 858,258
  4. Step 4: Simplify right side
    2,631,186x = 3,387,890,203,974
  5. Step 5: Solve for x
    x = 3,387,890,203,974/2,631,186
  6. Step 6: Final answer
    x = 1,287,590.54

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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.