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Finding the Fourth Proportional to 437,994.38, 656,139.44 and 287,778.26

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Solution

The fourth proportional to 437,994.38, 656,139.44 and 287,778.26 is: 431,107.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,994.38 : 656,139.44 = 287,778.26 : x
  2. Step 2: Convert to fraction form
    437,994.38/656,139.44 = 287,778.26/x
  3. Step 3: Cross multiply
    437,994.38x = 656,139.44 × 287,778.26
  4. Step 4: Simplify right side
    437,994.38x = 188,822,661,640.99
  5. Step 5: Solve for x
    x = 188,822,661,640.99/437,994.38
  6. Step 6: Final answer
    x = 431,107.50

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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.