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Finding the Fourth Proportional to 338,953.29, 508,409.01 and 139,268.54

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Solution

The fourth proportional to 338,953.29, 508,409.01 and 139,268.54 is: 208,894.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,953.29 : 508,409.01 = 139,268.54 : x
  2. Step 2: Convert to fraction form
    338,953.29/508,409.01 = 139,268.54/x
  3. Step 3: Cross multiply
    338,953.29x = 508,409.01 × 139,268.54
  4. Step 4: Simplify right side
    338,953.29x = 70,805,378,003.50
  5. Step 5: Solve for x
    x = 70,805,378,003.50/338,953.29
  6. Step 6: Final answer
    x = 208,894.20

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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.