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Finding the Fourth Proportional to 571,843.60, 789,128.94 and 330,118

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Solution

The fourth proportional to 571,843.60, 789,128.94 and 330,118 is: 455,554.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    571,843.60 : 789,128.94 = 330,118 : x
  2. Step 2: Convert to fraction form
    571,843.60/789,128.94 = 330,118/x
  3. Step 3: Cross multiply
    571,843.60x = 789,128.94 × 330,118
  4. Step 4: Simplify right side
    571,843.60x = 260,505,667,414.92
  5. Step 5: Solve for x
    x = 260,505,667,414.92/571,843.60
  6. Step 6: Final answer
    x = 455,554.05

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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.