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Finding the Fourth Proportional to 394,937.81, 545,043.41 and 225,176.21

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Solution

The fourth proportional to 394,937.81, 545,043.41 and 225,176.21 is: 310,759.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,937.81 : 545,043.41 = 225,176.21 : x
  2. Step 2: Convert to fraction form
    394,937.81/545,043.41 = 225,176.21/x
  3. Step 3: Cross multiply
    394,937.81x = 545,043.41 × 225,176.21
  4. Step 4: Simplify right side
    394,937.81x = 122,730,809,349.28
  5. Step 5: Solve for x
    x = 122,730,809,349.28/394,937.81
  6. Step 6: Final answer
    x = 310,759.84

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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.