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Finding the Fourth Proportional to 305,418.10, 458,305.80 and 127,910.20

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Solution

The fourth proportional to 305,418.10, 458,305.80 and 127,910.20 is: 191,940.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,418.10 : 458,305.80 = 127,910.20 : x
  2. Step 2: Convert to fraction form
    305,418.10/458,305.80 = 127,910.20/x
  3. Step 3: Cross multiply
    305,418.10x = 458,305.80 × 127,910.20
  4. Step 4: Simplify right side
    305,418.10x = 58,621,986,539.16
  5. Step 5: Solve for x
    x = 58,621,986,539.16/305,418.10
  6. Step 6: Final answer
    x = 191,940.12

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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.