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Finding the Fourth Proportional to 668,109.53, 922,028.87 and 396,338.33

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Solution

The fourth proportional to 668,109.53, 922,028.87 and 396,338.33 is: 546,969.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,109.53 : 922,028.87 = 396,338.33 : x
  2. Step 2: Convert to fraction form
    668,109.53/922,028.87 = 396,338.33/x
  3. Step 3: Cross multiply
    668,109.53x = 922,028.87 × 396,338.33
  4. Step 4: Simplify right side
    668,109.53x = 365,435,380,565.90
  5. Step 5: Solve for x
    x = 365,435,380,565.90/668,109.53
  6. Step 6: Final answer
    x = 546,969.27

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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.