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Finding the Fourth Proportional to 443,442.58, 665,139.26 and 394,087.44

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Solution

The fourth proportional to 443,442.58, 665,139.26 and 394,087.44 is: 591,109.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,442.58 : 665,139.26 = 394,087.44 : x
  2. Step 2: Convert to fraction form
    443,442.58/665,139.26 = 394,087.44/x
  3. Step 3: Cross multiply
    443,442.58x = 665,139.26 × 394,087.44
  4. Step 4: Simplify right side
    443,442.58x = 262,123,028,216.89
  5. Step 5: Solve for x
    x = 262,123,028,216.89/443,442.58
  6. Step 6: Final answer
    x = 591,109.29

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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.