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Finding the Fourth Proportional to 318,969.60, 439,983.41 and 189,821.49

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Solution

The fourth proportional to 318,969.60, 439,983.41 and 189,821.49 is: 261,837.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,969.60 : 439,983.41 = 189,821.49 : x
  2. Step 2: Convert to fraction form
    318,969.60/439,983.41 = 189,821.49/x
  3. Step 3: Cross multiply
    318,969.60x = 439,983.41 × 189,821.49
  4. Step 4: Simplify right side
    318,969.60x = 83,518,305,512.37
  5. Step 5: Solve for x
    x = 83,518,305,512.37/318,969.60
  6. Step 6: Final answer
    x = 261,837.82

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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.