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Finding the Fourth Proportional to 393,345, 590,455.17 and 203,754.78

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Solution

The fourth proportional to 393,345, 590,455.17 and 203,754.78 is: 305,858.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,345 : 590,455.17 = 203,754.78 : x
  2. Step 2: Convert to fraction form
    393,345/590,455.17 = 203,754.78/x
  3. Step 3: Cross multiply
    393,345x = 590,455.17 × 203,754.78
  4. Step 4: Simplify right side
    393,345x = 120,308,063,263.21
  5. Step 5: Solve for x
    x = 120,308,063,263.21/393,345
  6. Step 6: Final answer
    x = 305,858.89

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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.