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Finding the Fourth Proportional to 1,189,051.88, 1,783,573 and 430,715.88

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Solution

The fourth proportional to 1,189,051.88, 1,783,573 and 430,715.88 is: 646,072.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189,051.88 : 1,783,573 = 430,715.88 : x
  2. Step 2: Convert to fraction form
    1,189,051.88/1,783,573 = 430,715.88/x
  3. Step 3: Cross multiply
    1,189,051.88x = 1,783,573 × 430,715.88
  4. Step 4: Simplify right side
    1,189,051.88x = 768,213,214,239.24
  5. Step 5: Solve for x
    x = 768,213,214,239.24/1,189,051.88
  6. Step 6: Final answer
    x = 646,072.07

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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.