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Finding the Fourth Proportional to 505,213.75, 697,195.04 and 278,859.31

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Solution

The fourth proportional to 505,213.75, 697,195.04 and 278,859.31 is: 384,825.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,213.75 : 697,195.04 = 278,859.31 : x
  2. Step 2: Convert to fraction form
    505,213.75/697,195.04 = 278,859.31/x
  3. Step 3: Cross multiply
    505,213.75x = 697,195.04 × 278,859.31
  4. Step 4: Simplify right side
    505,213.75x = 194,419,326,395.53
  5. Step 5: Solve for x
    x = 194,419,326,395.53/505,213.75
  6. Step 6: Final answer
    x = 384,825.88

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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.