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Finding the Fourth Proportional to 436,247.20, 654,370.80 and 394,256.80

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Solution

The fourth proportional to 436,247.20, 654,370.80 and 394,256.80 is: 591,385.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    436,247.20 : 654,370.80 = 394,256.80 : x
  2. Step 2: Convert to fraction form
    436,247.20/654,370.80 = 394,256.80/x
  3. Step 3: Cross multiply
    436,247.20x = 654,370.80 × 394,256.80
  4. Step 4: Simplify right side
    436,247.20x = 257,990,137,621.44
  5. Step 5: Solve for x
    x = 257,990,137,621.44/436,247.20
  6. Step 6: Final answer
    x = 591,385.20

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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.