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Finding the Fourth Proportional to 451,415.04, 677,067.20 and 261,978.47

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Solution

The fourth proportional to 451,415.04, 677,067.20 and 261,978.47 is: 392,935.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,415.04 : 677,067.20 = 261,978.47 : x
  2. Step 2: Convert to fraction form
    451,415.04/677,067.20 = 261,978.47/x
  3. Step 3: Cross multiply
    451,415.04x = 677,067.20 × 261,978.47
  4. Step 4: Simplify right side
    451,415.04x = 177,377,029,443.01
  5. Step 5: Solve for x
    x = 177,377,029,443.01/451,415.04
  6. Step 6: Final answer
    x = 392,935.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.