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Finding the Fourth Proportional to 289,318.40, 433,912.80 and 190,174.40

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Solution

The fourth proportional to 289,318.40, 433,912.80 and 190,174.40 is: 285,219.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,318.40 : 433,912.80 = 190,174.40 : x
  2. Step 2: Convert to fraction form
    289,318.40/433,912.80 = 190,174.40/x
  3. Step 3: Cross multiply
    289,318.40x = 433,912.80 × 190,174.40
  4. Step 4: Simplify right side
    289,318.40x = 82,519,106,392.32
  5. Step 5: Solve for x
    x = 82,519,106,392.32/289,318.40
  6. Step 6: Final answer
    x = 285,219.01

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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.