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Finding the Fourth Proportional to 393,396.94, 590,093.46 and 339,926.21

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Solution

The fourth proportional to 393,396.94, 590,093.46 and 339,926.21 is: 509,887.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,396.94 : 590,093.46 = 339,926.21 : x
  2. Step 2: Convert to fraction form
    393,396.94/590,093.46 = 339,926.21/x
  3. Step 3: Cross multiply
    393,396.94x = 590,093.46 × 339,926.21
  4. Step 4: Simplify right side
    393,396.94x = 200,588,233,403.59
  5. Step 5: Solve for x
    x = 200,588,233,403.59/393,396.94
  6. Step 6: Final answer
    x = 509,887.63

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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.