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Finding the Fourth Proportional to 378,788.40, 568,838.70 and 366,978.60

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Solution

The fourth proportional to 378,788.40, 568,838.70 and 366,978.60 is: 551,103.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,788.40 : 568,838.70 = 366,978.60 : x
  2. Step 2: Convert to fraction form
    378,788.40/568,838.70 = 366,978.60/x
  3. Step 3: Cross multiply
    378,788.40x = 568,838.70 × 366,978.60
  4. Step 4: Simplify right side
    378,788.40x = 208,751,629,751.82
  5. Step 5: Solve for x
    x = 208,751,629,751.82/378,788.40
  6. Step 6: Final answer
    x = 551,103.54

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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.