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Finding the Fourth Proportional to 405,730.78, 608,651.55 and 169,018.09

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Solution

The fourth proportional to 405,730.78, 608,651.55 and 169,018.09 is: 253,550.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,730.78 : 608,651.55 = 169,018.09 : x
  2. Step 2: Convert to fraction form
    405,730.78/608,651.55 = 169,018.09/x
  3. Step 3: Cross multiply
    405,730.78x = 608,651.55 × 169,018.09
  4. Step 4: Simplify right side
    405,730.78x = 102,873,122,456.54
  5. Step 5: Solve for x
    x = 102,873,122,456.54/405,730.78
  6. Step 6: Final answer
    x = 253,550.21

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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.