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Finding the Fourth Proportional to 338,960.88, 508,575.24 and 128,654.64

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Solution

The fourth proportional to 338,960.88, 508,575.24 and 128,654.64 is: 193,032.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    338,960.88 : 508,575.24 = 128,654.64 : x
  2. Step 2: Convert to fraction form
    338,960.88/508,575.24 = 128,654.64/x
  3. Step 3: Cross multiply
    338,960.88x = 508,575.24 × 128,654.64
  4. Step 4: Simplify right side
    338,960.88x = 65,430,564,415.11
  5. Step 5: Solve for x
    x = 65,430,564,415.11/338,960.88
  6. Step 6: Final answer
    x = 193,032.79

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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.