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Finding the Fourth Proportional to 621,593.45, 857,287.21 and 366,698.60

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Solution

The fourth proportional to 621,593.45, 857,287.21 and 366,698.60 is: 505,742.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,593.45 : 857,287.21 = 366,698.60 : x
  2. Step 2: Convert to fraction form
    621,593.45/857,287.21 = 366,698.60/x
  3. Step 3: Cross multiply
    621,593.45x = 857,287.21 × 366,698.60
  4. Step 4: Simplify right side
    621,593.45x = 314,366,019,268.22
  5. Step 5: Solve for x
    x = 314,366,019,268.22/621,593.45
  6. Step 6: Final answer
    x = 505,742.17

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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.