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Finding the Fourth Proportional to 395,277.82, 545,485.13 and 213,989.75

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Solution

The fourth proportional to 395,277.82, 545,485.13 and 213,989.75 is: 295,306.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,277.82 : 545,485.13 = 213,989.75 : x
  2. Step 2: Convert to fraction form
    395,277.82/545,485.13 = 213,989.75/x
  3. Step 3: Cross multiply
    395,277.82x = 545,485.13 × 213,989.75
  4. Step 4: Simplify right side
    395,277.82x = 116,728,226,851.77
  5. Step 5: Solve for x
    x = 116,728,226,851.77/395,277.82
  6. Step 6: Final answer
    x = 295,306.79

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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.