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Finding the Fourth Proportional to 395,015.78, 545,121.77 and 213,727.73

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Solution

The fourth proportional to 395,015.78, 545,121.77 and 213,727.73 is: 294,944.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,015.78 : 545,121.77 = 213,727.73 : x
  2. Step 2: Convert to fraction form
    395,015.78/545,121.77 = 213,727.73/x
  3. Step 3: Cross multiply
    395,015.78x = 545,121.77 × 213,727.73
  4. Step 4: Simplify right side
    395,015.78x = 116,507,634,681.44
  5. Step 5: Solve for x
    x = 116,507,634,681.44/395,015.78
  6. Step 6: Final answer
    x = 294,944.25

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1.5x scale

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.