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Finding the Fourth Proportional to 443,612.40, 664,252.20 and 324,639.60

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Solution

The fourth proportional to 443,612.40, 664,252.20 and 324,639.60 is: 486,105.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,612.40 : 664,252.20 = 324,639.60 : x
  2. Step 2: Convert to fraction form
    443,612.40/664,252.20 = 324,639.60/x
  3. Step 3: Cross multiply
    443,612.40x = 664,252.20 × 324,639.60
  4. Step 4: Simplify right side
    443,612.40x = 215,642,568,507.12
  5. Step 5: Solve for x
    x = 215,642,568,507.12/443,612.40
  6. Step 6: Final answer
    x = 486,105.82

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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.