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Finding the Fourth Proportional to 258,556.64, 356,804.73 and 145,379.39

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Solution

The fourth proportional to 258,556.64, 356,804.73 and 145,379.39 is: 200,621.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,556.64 : 356,804.73 = 145,379.39 : x
  2. Step 2: Convert to fraction form
    258,556.64/356,804.73 = 145,379.39/x
  3. Step 3: Cross multiply
    258,556.64x = 356,804.73 × 145,379.39
  4. Step 4: Simplify right side
    258,556.64x = 51,872,052,212.49
  5. Step 5: Solve for x
    x = 51,872,052,212.49/258,556.64
  6. Step 6: Final answer
    x = 200,621.62

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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.