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Finding the Fourth Proportional to 287,409.60, 396,625.34 and 166,620.92

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Solution

The fourth proportional to 287,409.60, 396,625.34 and 166,620.92 is: 229,936.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,409.60 : 396,625.34 = 166,620.92 : x
  2. Step 2: Convert to fraction form
    287,409.60/396,625.34 = 166,620.92/x
  3. Step 3: Cross multiply
    287,409.60x = 396,625.34 × 166,620.92
  4. Step 4: Simplify right side
    287,409.60x = 66,086,077,479.54
  5. Step 5: Solve for x
    x = 66,086,077,479.54/287,409.60
  6. Step 6: Final answer
    x = 229,936.92

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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.