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Finding the Fourth Proportional to 455,843.70, 629,086.29 and 274,612.47

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Solution

The fourth proportional to 455,843.70, 629,086.29 and 274,612.47 is: 378,978.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,843.70 : 629,086.29 = 274,612.47 : x
  2. Step 2: Convert to fraction form
    455,843.70/629,086.29 = 274,612.47/x
  3. Step 3: Cross multiply
    455,843.70x = 629,086.29 × 274,612.47
  4. Step 4: Simplify right side
    455,843.70x = 172,754,939,940.04
  5. Step 5: Solve for x
    x = 172,754,939,940.04/455,843.70
  6. Step 6: Final answer
    x = 378,978.45

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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.