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Finding the Fourth Proportional to 443,837.48, 665,761.10 and 128,297.12

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Solution

The fourth proportional to 443,837.48, 665,761.10 and 128,297.12 is: 192,447.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,837.48 : 665,761.10 = 128,297.12 : x
  2. Step 2: Convert to fraction form
    443,837.48/665,761.10 = 128,297.12/x
  3. Step 3: Cross multiply
    443,837.48x = 665,761.10 × 128,297.12
  4. Step 4: Simplify right side
    443,837.48x = 85,415,231,738.03
  5. Step 5: Solve for x
    x = 85,415,231,738.03/443,837.48
  6. Step 6: Final answer
    x = 192,447.09

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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.