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Finding the Fourth Proportional to 338,935.17, 508,100.73 and 128,720.73

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Solution

The fourth proportional to 338,935.17, 508,100.73 and 128,720.73 is: 192,966.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,935.17 : 508,100.73 = 128,720.73 : x
  2. Step 2: Convert to fraction form
    338,935.17/508,100.73 = 128,720.73/x
  3. Step 3: Cross multiply
    338,935.17x = 508,100.73 × 128,720.73
  4. Step 4: Simplify right side
    338,935.17x = 65,403,096,879.13
  5. Step 5: Solve for x
    x = 65,403,096,879.13/338,935.17
  6. Step 6: Final answer
    x = 192,966.39

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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.