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Finding the Fourth Proportional to 395,023.37, 545,128.36 and 213,731.32

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Solution

The fourth proportional to 395,023.37, 545,128.36 and 213,731.32 is: 294,947.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,023.37 : 545,128.36 = 213,731.32 : x
  2. Step 2: Convert to fraction form
    395,023.37/545,128.36 = 213,731.32/x
  3. Step 3: Cross multiply
    395,023.37x = 545,128.36 × 213,731.32
  4. Step 4: Simplify right side
    395,023.37x = 116,511,002,055.09
  5. Step 5: Solve for x
    x = 116,511,002,055.09/395,023.37
  6. Step 6: Final answer
    x = 294,947.12

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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.