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Finding the Fourth Proportional to 505,185.88, 697,106.88 and 278,816.80

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Solution

The fourth proportional to 505,185.88, 697,106.88 and 278,816.80 is: 384,739.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,185.88 : 697,106.88 = 278,816.80 : x
  2. Step 2: Convert to fraction form
    505,185.88/697,106.88 = 278,816.80/x
  3. Step 3: Cross multiply
    505,185.88x = 697,106.88 × 278,816.80
  4. Step 4: Simplify right side
    505,185.88x = 194,365,109,539.58
  5. Step 5: Solve for x
    x = 194,365,109,539.58/505,185.88
  6. Step 6: Final answer
    x = 384,739.79

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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.