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Finding the Fourth Proportional to 394,978.99, 545,068.91 and 222,952.86

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Solution

The fourth proportional to 394,978.99, 545,068.91 and 222,952.86 is: 307,673.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,978.99 : 545,068.91 = 222,952.86 : x
  2. Step 2: Convert to fraction form
    394,978.99/545,068.91 = 222,952.86/x
  3. Step 3: Cross multiply
    394,978.99x = 545,068.91 × 222,952.86
  4. Step 4: Simplify right side
    394,978.99x = 121,524,673,462.04
  5. Step 5: Solve for x
    x = 121,524,673,462.04/394,978.99
  6. Step 6: Final answer
    x = 307,673.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.