Home / 443,081.20-664,621.80-394,092.40

Finding the Fourth Proportional to 443,081.20, 664,621.80 and 394,092.40

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Solution

The fourth proportional to 443,081.20, 664,621.80 and 394,092.40 is: 591,138.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,081.20 : 664,621.80 = 394,092.40 : x
  2. Step 2: Convert to fraction form
    443,081.20/664,621.80 = 394,092.40/x
  3. Step 3: Cross multiply
    443,081.20x = 664,621.80 × 394,092.40
  4. Step 4: Simplify right side
    443,081.20x = 261,922,400,254.32
  5. Step 5: Solve for x
    x = 261,922,400,254.32/443,081.20
  6. Step 6: Final answer
    x = 591,138.60

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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.