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Finding the Fourth Proportional to 289,600.40, 434,384.40 and 89,919.20

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Solution

The fourth proportional to 289,600.40, 434,384.40 and 89,919.20 is: 134,873.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,600.40 : 434,384.40 = 89,919.20 : x
  2. Step 2: Convert to fraction form
    289,600.40/434,384.40 = 89,919.20/x
  3. Step 3: Cross multiply
    289,600.40x = 434,384.40 × 89,919.20
  4. Step 4: Simplify right side
    289,600.40x = 39,059,497,740.48
  5. Step 5: Solve for x
    x = 39,059,497,740.48/289,600.40
  6. Step 6: Final answer
    x = 134,873.77

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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.