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Finding the Fourth Proportional to 378,330.88, 567,147.84 and 128,839.36

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Solution

The fourth proportional to 378,330.88, 567,147.84 and 128,839.36 is: 193,140.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,330.88 : 567,147.84 = 128,839.36 : x
  2. Step 2: Convert to fraction form
    378,330.88/567,147.84 = 128,839.36/x
  3. Step 3: Cross multiply
    378,330.88x = 567,147.84 × 128,839.36
  4. Step 4: Simplify right side
    378,330.88x = 73,070,964,730.98
  5. Step 5: Solve for x
    x = 73,070,964,730.98/378,330.88
  6. Step 6: Final answer
    x = 193,140.37

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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.