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Finding the Fourth Proportional to 405,698.80, 608,418.60 and 168,984.40

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Solution

The fourth proportional to 405,698.80, 608,418.60 and 168,984.40 is: 253,422.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,698.80 : 608,418.60 = 168,984.40 : x
  2. Step 2: Convert to fraction form
    405,698.80/608,418.60 = 168,984.40/x
  3. Step 3: Cross multiply
    405,698.80x = 608,418.60 × 168,984.40
  4. Step 4: Simplify right side
    405,698.80x = 102,813,252,069.84
  5. Step 5: Solve for x
    x = 102,813,252,069.84/405,698.80
  6. Step 6: Final answer
    x = 253,422.62

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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.