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Finding the Fourth Proportional to 289,492.20, 433,979.10 and 189,700.20

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Solution

The fourth proportional to 289,492.20, 433,979.10 and 189,700.20 is: 284,380.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,492.20 : 433,979.10 = 189,700.20 : x
  2. Step 2: Convert to fraction form
    289,492.20/433,979.10 = 189,700.20/x
  3. Step 3: Cross multiply
    289,492.20x = 433,979.10 × 189,700.20
  4. Step 4: Simplify right side
    289,492.20x = 82,325,922,065.82
  5. Step 5: Solve for x
    x = 82,325,922,065.82/289,492.20
  6. Step 6: Final answer
    x = 284,380.45

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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.