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Finding the Fourth Proportional to 505,571.56, 697,692.90 and 279,220.84

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Solution

The fourth proportional to 505,571.56, 697,692.90 and 279,220.84 is: 385,327.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,571.56 : 697,692.90 = 279,220.84 : x
  2. Step 2: Convert to fraction form
    505,571.56/697,692.90 = 279,220.84/x
  3. Step 3: Cross multiply
    505,571.56x = 697,692.90 × 279,220.84
  4. Step 4: Simplify right side
    505,571.56x = 194,810,397,600.04
  5. Step 5: Solve for x
    x = 194,810,397,600.04/505,571.56
  6. Step 6: Final answer
    x = 385,327.05

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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.