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Finding the Fourth Proportional to 505,581.12, 697,697.28 and 279,229.44

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Solution

The fourth proportional to 505,581.12, 697,697.28 and 279,229.44 is: 385,334.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,581.12 : 697,697.28 = 279,229.44 : x
  2. Step 2: Convert to fraction form
    505,581.12/697,697.28 = 279,229.44/x
  3. Step 3: Cross multiply
    505,581.12x = 697,697.28 × 279,229.44
  4. Step 4: Simplify right side
    505,581.12x = 194,817,620,783.92
  5. Step 5: Solve for x
    x = 194,817,620,783.92/505,581.12
  6. Step 6: Final answer
    x = 385,334.05

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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.