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Finding the Fourth Proportional to 455,900.21, 629,229.23 and 300,578.79

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Solution

The fourth proportional to 455,900.21, 629,229.23 and 300,578.79 is: 414,856.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,900.21 : 629,229.23 = 300,578.79 : x
  2. Step 2: Convert to fraction form
    455,900.21/629,229.23 = 300,578.79/x
  3. Step 3: Cross multiply
    455,900.21x = 629,229.23 × 300,578.79
  4. Step 4: Simplify right side
    455,900.21x = 189,132,960,586.03
  5. Step 5: Solve for x
    x = 189,132,960,586.03/455,900.21
  6. Step 6: Final answer
    x = 414,856.05

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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.