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Finding the Fourth Proportional to 403,516.70, 605,049.05 and 187,143.43

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Solution

The fourth proportional to 403,516.70, 605,049.05 and 187,143.43 is: 280,610.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,516.70 : 605,049.05 = 187,143.43 : x
  2. Step 2: Convert to fraction form
    403,516.70/605,049.05 = 187,143.43/x
  3. Step 3: Cross multiply
    403,516.70x = 605,049.05 × 187,143.43
  4. Step 4: Simplify right side
    403,516.70x = 113,230,954,535.24
  5. Step 5: Solve for x
    x = 113,230,954,535.24/403,516.70
  6. Step 6: Final answer
    x = 280,610.33

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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.