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Finding the Fourth Proportional to 405,388.71, 559,443.23 and 235,622.83

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Solution

The fourth proportional to 405,388.71, 559,443.23 and 235,622.83 is: 325,163.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,388.71 : 559,443.23 = 235,622.83 : x
  2. Step 2: Convert to fraction form
    405,388.71/559,443.23 = 235,622.83/x
  3. Step 3: Cross multiply
    405,388.71x = 559,443.23 × 235,622.83
  4. Step 4: Simplify right side
    405,388.71x = 131,817,597,076.94
  5. Step 5: Solve for x
    x = 131,817,597,076.94/405,388.71
  6. Step 6: Final answer
    x = 325,163.46

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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.