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Finding the Fourth Proportional to 414,538.80, 621,808.20 and 265,239.60

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Solution

The fourth proportional to 414,538.80, 621,808.20 and 265,239.60 is: 397,859.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    414,538.80 : 621,808.20 = 265,239.60 : x
  2. Step 2: Convert to fraction form
    414,538.80/621,808.20 = 265,239.60/x
  3. Step 3: Cross multiply
    414,538.80x = 621,808.20 × 265,239.60
  4. Step 4: Simplify right side
    414,538.80x = 164,928,158,244.72
  5. Step 5: Solve for x
    x = 164,928,158,244.72/414,538.80
  6. Step 6: Final answer
    x = 397,859.40

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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.