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Finding the Fourth Proportional to 407,739.80, 611,682.60 and 171,106.40

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Solution

The fourth proportional to 407,739.80, 611,682.60 and 171,106.40 is: 256,690.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,739.80 : 611,682.60 = 171,106.40 : x
  2. Step 2: Convert to fraction form
    407,739.80/611,682.60 = 171,106.40/x
  3. Step 3: Cross multiply
    407,739.80x = 611,682.60 × 171,106.40
  4. Step 4: Simplify right side
    407,739.80x = 104,662,807,628.64
  5. Step 5: Solve for x
    x = 104,662,807,628.64/407,739.80
  6. Step 6: Final answer
    x = 256,690.19

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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.