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Finding the Fourth Proportional to 209,656.87, 315,885.71 and 189,691.96

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Solution

The fourth proportional to 209,656.87, 315,885.71 and 189,691.96 is: 285,804.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,656.87 : 315,885.71 = 189,691.96 : x
  2. Step 2: Convert to fraction form
    209,656.87/315,885.71 = 189,691.96/x
  3. Step 3: Cross multiply
    209,656.87x = 315,885.71 × 189,691.96
  4. Step 4: Simplify right side
    209,656.87x = 59,920,978,675.68
  5. Step 5: Solve for x
    x = 59,920,978,675.68/209,656.87
  6. Step 6: Final answer
    x = 285,804.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.