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Finding the Fourth Proportional to 443,079.70, 664,619.55 and 394,090.90

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Solution

The fourth proportional to 443,079.70, 664,619.55 and 394,090.90 is: 591,136.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,079.70 : 664,619.55 = 394,090.90 : x
  2. Step 2: Convert to fraction form
    443,079.70/664,619.55 = 394,090.90/x
  3. Step 3: Cross multiply
    443,079.70x = 664,619.55 × 394,090.90
  4. Step 4: Simplify right side
    443,079.70x = 261,920,516,617.10
  5. Step 5: Solve for x
    x = 261,920,516,617.10/443,079.70
  6. Step 6: Final answer
    x = 591,136.35

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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.