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Finding the Fourth Proportional to 641,999.47, 885,958.46 and 355,519.21

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Solution

The fourth proportional to 641,999.47, 885,958.46 and 355,519.21 is: 490,616.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,999.47 : 885,958.46 = 355,519.21 : x
  2. Step 2: Convert to fraction form
    641,999.47/885,958.46 = 355,519.21/x
  3. Step 3: Cross multiply
    641,999.47x = 885,958.46 × 355,519.21
  4. Step 4: Simplify right side
    641,999.47x = 314,975,251,792.02
  5. Step 5: Solve for x
    x = 314,975,251,792.02/641,999.47
  6. Step 6: Final answer
    x = 490,616.06

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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.