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Finding the Fourth Proportional to 505,369.57, 697,471.17 and 287,631.19

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Solution

The fourth proportional to 505,369.57, 697,471.17 and 287,631.19 is: 396,965.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,369.57 : 697,471.17 = 287,631.19 : x
  2. Step 2: Convert to fraction form
    505,369.57/697,471.17 = 287,631.19/x
  3. Step 3: Cross multiply
    505,369.57x = 697,471.17 × 287,631.19
  4. Step 4: Simplify right side
    505,369.57x = 200,614,462,617.79
  5. Step 5: Solve for x
    x = 200,614,462,617.79/505,369.57
  6. Step 6: Final answer
    x = 396,965.85

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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.