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Finding the Fourth Proportional to 338,993.51, 508,293.43 and 128,516.63

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Solution

The fourth proportional to 338,993.51, 508,293.43 and 128,516.63 is: 192,700.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,993.51 : 508,293.43 = 128,516.63 : x
  2. Step 2: Convert to fraction form
    338,993.51/508,293.43 = 128,516.63/x
  3. Step 3: Cross multiply
    338,993.51x = 508,293.43 × 128,516.63
  4. Step 4: Simplify right side
    338,993.51x = 65,324,155,811.98
  5. Step 5: Solve for x
    x = 65,324,155,811.98/338,993.51
  6. Step 6: Final answer
    x = 192,700.32

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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.