Home / 394,928.88-545,000.21-213,640.36

Finding the Fourth Proportional to 394,928.88, 545,000.21 and 213,640.36

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Solution

The fourth proportional to 394,928.88, 545,000.21 and 213,640.36 is: 294,822.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,928.88 : 545,000.21 = 213,640.36 : x
  2. Step 2: Convert to fraction form
    394,928.88/545,000.21 = 213,640.36/x
  3. Step 3: Cross multiply
    394,928.88x = 545,000.21 × 213,640.36
  4. Step 4: Simplify right side
    394,928.88x = 116,434,041,268.17
  5. Step 5: Solve for x
    x = 116,434,041,268.17/394,928.88
  6. Step 6: Final answer
    x = 294,822.81

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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.