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Finding the Fourth Proportional to 455,219.95, 628,455.15 and 273,976.39

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Solution

The fourth proportional to 455,219.95, 628,455.15 and 273,976.39 is: 378,238.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,219.95 : 628,455.15 = 273,976.39 : x
  2. Step 2: Convert to fraction form
    455,219.95/628,455.15 = 273,976.39/x
  3. Step 3: Cross multiply
    455,219.95x = 628,455.15 × 273,976.39
  4. Step 4: Simplify right side
    455,219.95x = 172,181,873,273.91
  5. Step 5: Solve for x
    x = 172,181,873,273.91/455,219.95
  6. Step 6: Final answer
    x = 378,238.86

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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.