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Finding the Fourth Proportional to 289,205.20, 433,807.80 and 189,992.40

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Solution

The fourth proportional to 289,205.20, 433,807.80 and 189,992.40 is: 284,988.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,205.20 : 433,807.80 = 189,992.40 : x
  2. Step 2: Convert to fraction form
    289,205.20/433,807.80 = 189,992.40/x
  3. Step 3: Cross multiply
    289,205.20x = 433,807.80 × 189,992.40
  4. Step 4: Simplify right side
    289,205.20x = 82,420,185,060.72
  5. Step 5: Solve for x
    x = 82,420,185,060.72/289,205.20
  6. Step 6: Final answer
    x = 284,988.60

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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.