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Finding the Fourth Proportional to 443,408.01, 665,210.43 and 127,840.38

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Solution

The fourth proportional to 443,408.01, 665,210.43 and 127,840.38 is: 191,788.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    443,408.01 : 665,210.43 = 127,840.38 : x
  2. Step 2: Convert to fraction form
    443,408.01/665,210.43 = 127,840.38/x
  3. Step 3: Cross multiply
    443,408.01x = 665,210.43 × 127,840.38
  4. Step 4: Simplify right side
    443,408.01x = 85,040,754,151.16
  5. Step 5: Solve for x
    x = 85,040,754,151.16/443,408.01
  6. Step 6: Final answer
    x = 191,788.94

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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.