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Finding the Fourth Proportional to 395,045.46, 545,067.59 and 239,992.25

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Solution

The fourth proportional to 395,045.46, 545,067.59 and 239,992.25 is: 331,131.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,045.46 : 545,067.59 = 239,992.25 : x
  2. Step 2: Convert to fraction form
    395,045.46/545,067.59 = 239,992.25/x
  3. Step 3: Cross multiply
    395,045.46x = 545,067.59 × 239,992.25
  4. Step 4: Simplify right side
    395,045.46x = 130,811,993,400.88
  5. Step 5: Solve for x
    x = 130,811,993,400.88/395,045.46
  6. Step 6: Final answer
    x = 331,131.49

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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.