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Finding the Fourth Proportional to 505,568.56, 697,688.76 and 279,217.84

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Solution

The fourth proportional to 505,568.56, 697,688.76 and 279,217.84 is: 385,322.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,568.56 : 697,688.76 = 279,217.84 : x
  2. Step 2: Convert to fraction form
    505,568.56/697,688.76 = 279,217.84/x
  3. Step 3: Cross multiply
    505,568.56x = 697,688.76 × 279,217.84
  4. Step 4: Simplify right side
    505,568.56x = 194,807,148,559.48
  5. Step 5: Solve for x
    x = 194,807,148,559.48/505,568.56
  6. Step 6: Final answer
    x = 385,322.91

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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.