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Finding the Fourth Proportional to 661,629.60, 991,958.40 and 262,072.80

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Solution

The fourth proportional to 661,629.60, 991,958.40 and 262,072.80 is: 392,916.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,629.60 : 991,958.40 = 262,072.80 : x
  2. Step 2: Convert to fraction form
    661,629.60/991,958.40 = 262,072.80/x
  3. Step 3: Cross multiply
    661,629.60x = 991,958.40 × 262,072.80
  4. Step 4: Simplify right side
    661,629.60x = 259,965,315,371.52
  5. Step 5: Solve for x
    x = 259,965,315,371.52/661,629.60
  6. Step 6: Final answer
    x = 392,916.69

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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.