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Finding the Fourth Proportional to 395,255.13, 545,451.80 and 213,968.49

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Solution

The fourth proportional to 395,255.13, 545,451.80 and 213,968.49 is: 295,276.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,255.13 : 545,451.80 = 213,968.49 : x
  2. Step 2: Convert to fraction form
    395,255.13/545,451.80 = 213,968.49/x
  3. Step 3: Cross multiply
    395,255.13x = 545,451.80 × 213,968.49
  4. Step 4: Simplify right side
    395,255.13x = 116,709,498,013.78
  5. Step 5: Solve for x
    x = 116,709,498,013.78/395,255.13
  6. Step 6: Final answer
    x = 295,276.36

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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.