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Finding the Fourth Proportional to 405,881.83, 608,651.52 and 121,612.78

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Solution

The fourth proportional to 405,881.83, 608,651.52 and 121,612.78 is: 182,367.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,881.83 : 608,651.52 = 121,612.78 : x
  2. Step 2: Convert to fraction form
    405,881.83/608,651.52 = 121,612.78/x
  3. Step 3: Cross multiply
    405,881.83x = 608,651.52 × 121,612.78
  4. Step 4: Simplify right side
    405,881.83x = 74,019,803,398.43
  5. Step 5: Solve for x
    x = 74,019,803,398.43/405,881.83
  6. Step 6: Final answer
    x = 182,367.87

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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.