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Finding the Fourth Proportional to 405,755.76, 608,894.76 and 218,896.24

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Solution

The fourth proportional to 405,755.76, 608,894.76 and 218,896.24 is: 328,485.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,755.76 : 608,894.76 = 218,896.24 : x
  2. Step 2: Convert to fraction form
    405,755.76/608,894.76 = 218,896.24/x
  3. Step 3: Cross multiply
    405,755.76x = 608,894.76 × 218,896.24
  4. Step 4: Simplify right side
    405,755.76x = 133,284,773,519.70
  5. Step 5: Solve for x
    x = 133,284,773,519.70/405,755.76
  6. Step 6: Final answer
    x = 328,485.23

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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.