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Finding the Fourth Proportional to 1,279,356.54, 1,764,771.94 and 826,647.54

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Solution

The fourth proportional to 1,279,356.54, 1,764,771.94 and 826,647.54 is: 1,140,295.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,356.54 : 1,764,771.94 = 826,647.54 : x
  2. Step 2: Convert to fraction form
    1,279,356.54/1,764,771.94 = 826,647.54/x
  3. Step 3: Cross multiply
    1,279,356.54x = 1,764,771.94 × 826,647.54
  4. Step 4: Simplify right side
    1,279,356.54x = 1,458,844,369,904.93
  5. Step 5: Solve for x
    x = 1,458,844,369,904.93/1,279,356.54
  6. Step 6: Final answer
    x = 1,140,295.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.