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Finding the Fourth Proportional to 619,968.77, 855,336.80 and 405,232.73

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Solution

The fourth proportional to 619,968.77, 855,336.80 and 405,232.73 is: 559,077.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,968.77 : 855,336.80 = 405,232.73 : x
  2. Step 2: Convert to fraction form
    619,968.77/855,336.80 = 405,232.73/x
  3. Step 3: Cross multiply
    619,968.77x = 855,336.80 × 405,232.73
  4. Step 4: Simplify right side
    619,968.77x = 346,610,464,507.30
  5. Step 5: Solve for x
    x = 346,610,464,507.30/619,968.77
  6. Step 6: Final answer
    x = 559,077.30

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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.