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Finding the Fourth Proportional to 405,633.60, 608,450.40 and 393,969.60

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Solution

The fourth proportional to 405,633.60, 608,450.40 and 393,969.60 is: 590,954.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,633.60 : 608,450.40 = 393,969.60 : x
  2. Step 2: Convert to fraction form
    405,633.60/608,450.40 = 393,969.60/x
  3. Step 3: Cross multiply
    405,633.60x = 608,450.40 × 393,969.60
  4. Step 4: Simplify right side
    405,633.60x = 239,710,960,707.84
  5. Step 5: Solve for x
    x = 239,710,960,707.84/405,633.60
  6. Step 6: Final answer
    x = 590,954.40

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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.