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Finding the Fourth Proportional to 505,087.80, 756,249.30 and 394,495.80

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Solution

The fourth proportional to 505,087.80, 756,249.30 and 394,495.80 is: 590,663.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,087.80 : 756,249.30 = 394,495.80 : x
  2. Step 2: Convert to fraction form
    505,087.80/756,249.30 = 394,495.80/x
  3. Step 3: Cross multiply
    505,087.80x = 756,249.30 × 394,495.80
  4. Step 4: Simplify right side
    505,087.80x = 298,337,172,602.94
  5. Step 5: Solve for x
    x = 298,337,172,602.94/505,087.80
  6. Step 6: Final answer
    x = 590,663.98

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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.