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Finding the Fourth Proportional to 405,805.77, 608,796.14 and 121,518.86

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Solution

The fourth proportional to 405,805.77, 608,796.14 and 121,518.86 is: 182,304.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,805.77 : 608,796.14 = 121,518.86 : x
  2. Step 2: Convert to fraction form
    405,805.77/608,796.14 = 121,518.86/x
  3. Step 3: Cross multiply
    405,805.77x = 608,796.14 × 121,518.86
  4. Step 4: Simplify right side
    405,805.77x = 73,980,209,253.63
  5. Step 5: Solve for x
    x = 73,980,209,253.63/405,805.77
  6. Step 6: Final answer
    x = 182,304.48

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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.