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Finding the Fourth Proportional to 455,958.80, 682,901.40 and 287,997.20

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Solution

The fourth proportional to 455,958.80, 682,901.40 and 287,997.20 is: 431,340.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,958.80 : 682,901.40 = 287,997.20 : x
  2. Step 2: Convert to fraction form
    455,958.80/682,901.40 = 287,997.20/x
  3. Step 3: Cross multiply
    455,958.80x = 682,901.40 × 287,997.20
  4. Step 4: Simplify right side
    455,958.80x = 196,673,691,076.08
  5. Step 5: Solve for x
    x = 196,673,691,076.08/455,958.80
  6. Step 6: Final answer
    x = 431,340.93

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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.