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Finding the Fourth Proportional to 289,185.87, 399,078.50 and 168,397.59

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Solution

The fourth proportional to 289,185.87, 399,078.50 and 168,397.59 is: 232,389.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,185.87 : 399,078.50 = 168,397.59 : x
  2. Step 2: Convert to fraction form
    289,185.87/399,078.50 = 168,397.59/x
  3. Step 3: Cross multiply
    289,185.87x = 399,078.50 × 168,397.59
  4. Step 4: Simplify right side
    289,185.87x = 67,203,857,620.82
  5. Step 5: Solve for x
    x = 67,203,857,620.82/289,185.87
  6. Step 6: Final answer
    x = 232,389.84

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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.