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Finding the Fourth Proportional to 619,955.52, 855,318.56 and 405,219.60

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Solution

The fourth proportional to 619,955.52, 855,318.56 and 405,219.60 is: 559,059.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,955.52 : 855,318.56 = 405,219.60 : x
  2. Step 2: Convert to fraction form
    619,955.52/855,318.56 = 405,219.60/x
  3. Step 3: Cross multiply
    619,955.52x = 855,318.56 × 405,219.60
  4. Step 4: Simplify right side
    619,955.52x = 346,591,844,755.78
  5. Step 5: Solve for x
    x = 346,591,844,755.78/619,955.52
  6. Step 6: Final answer
    x = 559,059.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.