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Finding the Fourth Proportional to 395,163.59, 545,321.04 and 213,871.22

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Solution

The fourth proportional to 395,163.59, 545,321.04 and 213,871.22 is: 295,139.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,163.59 : 545,321.04 = 213,871.22 : x
  2. Step 2: Convert to fraction form
    395,163.59/545,321.04 = 213,871.22/x
  3. Step 3: Cross multiply
    395,163.59x = 545,321.04 × 213,871.22
  4. Step 4: Simplify right side
    395,163.59x = 116,628,473,389.86
  5. Step 5: Solve for x
    x = 116,628,473,389.86/395,163.59
  6. Step 6: Final answer
    x = 295,139.73

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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.