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Finding the Fourth Proportional to 668,109.78, 922,029.22 and 396,338.58

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Solution

The fourth proportional to 668,109.78, 922,029.22 and 396,338.58 is: 546,969.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,109.78 : 922,029.22 = 396,338.58 : x
  2. Step 2: Convert to fraction form
    668,109.78/922,029.22 = 396,338.58/x
  3. Step 3: Cross multiply
    668,109.78x = 922,029.22 × 396,338.58
  4. Step 4: Simplify right side
    668,109.78x = 365,435,751,773.31
  5. Step 5: Solve for x
    x = 365,435,751,773.31/668,109.78
  6. Step 6: Final answer
    x = 546,969.62

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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.