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Finding the Fourth Proportional to 289,784.20, 434,417.10 and 189,992.20

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Solution

The fourth proportional to 289,784.20, 434,417.10 and 189,992.20 is: 284,818.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,784.20 : 434,417.10 = 189,992.20 : x
  2. Step 2: Convert to fraction form
    289,784.20/434,417.10 = 189,992.20/x
  3. Step 3: Cross multiply
    289,784.20x = 434,417.10 × 189,992.20
  4. Step 4: Simplify right side
    289,784.20x = 82,535,860,546.62
  5. Step 5: Solve for x
    x = 82,535,860,546.62/289,784.20
  6. Step 6: Final answer
    x = 284,818.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.