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Finding the Fourth Proportional to 395,190.36, 545,358.96 and 213,900.48

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Solution

The fourth proportional to 395,190.36, 545,358.96 and 213,900.48 is: 295,180.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,190.36 : 545,358.96 = 213,900.48 : x
  2. Step 2: Convert to fraction form
    395,190.36/545,358.96 = 213,900.48/x
  3. Step 3: Cross multiply
    395,190.36x = 545,358.96 × 213,900.48
  4. Step 4: Simplify right side
    395,190.36x = 116,652,543,316.30
  5. Step 5: Solve for x
    x = 116,652,543,316.30/395,190.36
  6. Step 6: Final answer
    x = 295,180.64

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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.