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Finding the Fourth Proportional to 769,679.64, 1,062,190.72 and 430,147.88

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Solution

The fourth proportional to 769,679.64, 1,062,190.72 and 430,147.88 is: 593,622.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    769,679.64 : 1,062,190.72 = 430,147.88 : x
  2. Step 2: Convert to fraction form
    769,679.64/1,062,190.72 = 430,147.88/x
  3. Step 3: Cross multiply
    769,679.64x = 1,062,190.72 × 430,147.88
  4. Step 4: Simplify right side
    769,679.64x = 456,899,086,363.67
  5. Step 5: Solve for x
    x = 456,899,086,363.67/769,679.64
  6. Step 6: Final answer
    x = 593,622.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.