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Finding the Fourth Proportional to 393,627.10, 590,513.55 and 127,396.30

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Solution

The fourth proportional to 393,627.10, 590,513.55 and 127,396.30 is: 191,118.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,627.10 : 590,513.55 = 127,396.30 : x
  2. Step 2: Convert to fraction form
    393,627.10/590,513.55 = 127,396.30/x
  3. Step 3: Cross multiply
    393,627.10x = 590,513.55 × 127,396.30
  4. Step 4: Simplify right side
    393,627.10x = 75,229,241,369.87
  5. Step 5: Solve for x
    x = 75,229,241,369.87/393,627.10
  6. Step 6: Final answer
    x = 191,118.04

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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.