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Finding the Fourth Proportional to 289,578.20, 434,021.70 and 121,098.20

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Solution

The fourth proportional to 289,578.20, 434,021.70 and 121,098.20 is: 181,502.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,578.20 : 434,021.70 = 121,098.20 : x
  2. Step 2: Convert to fraction form
    289,578.20/434,021.70 = 121,098.20/x
  3. Step 3: Cross multiply
    289,578.20x = 434,021.70 × 121,098.20
  4. Step 4: Simplify right side
    289,578.20x = 52,559,246,630.94
  5. Step 5: Solve for x
    x = 52,559,246,630.94/289,578.20
  6. Step 6: Final answer
    x = 181,502.77

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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.