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Finding the Fourth Proportional to 338,954.29, 508,410.51 and 139,269.54

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Solution

The fourth proportional to 338,954.29, 508,410.51 and 139,269.54 is: 208,895.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,954.29 : 508,410.51 = 139,269.54 : x
  2. Step 2: Convert to fraction form
    338,954.29/508,410.51 = 139,269.54/x
  3. Step 3: Cross multiply
    338,954.29x = 508,410.51 × 139,269.54
  4. Step 4: Simplify right side
    338,954.29x = 70,806,097,858.87
  5. Step 5: Solve for x
    x = 70,806,097,858.87/338,954.29
  6. Step 6: Final answer
    x = 208,895.71

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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.