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Finding the Fourth Proportional to 395,047.32, 545,163.80 and 213,759.60

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Solution

The fourth proportional to 395,047.32, 545,163.80 and 213,759.60 is: 294,987.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,047.32 : 545,163.80 = 213,759.60 : x
  2. Step 2: Convert to fraction form
    395,047.32/545,163.80 = 213,759.60/x
  3. Step 3: Cross multiply
    395,047.32x = 545,163.80 × 213,759.60
  4. Step 4: Simplify right side
    395,047.32x = 116,533,994,753.68
  5. Step 5: Solve for x
    x = 116,533,994,753.68/395,047.32
  6. Step 6: Final answer
    x = 294,987.43

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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.