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Finding the Fourth Proportional to 287,405.98, 396,620.34 and 166,617.28

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Solution

The fourth proportional to 287,405.98, 396,620.34 and 166,617.28 is: 229,931.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,405.98 : 396,620.34 = 166,617.28 : x
  2. Step 2: Convert to fraction form
    287,405.98/396,620.34 = 166,617.28/x
  3. Step 3: Cross multiply
    287,405.98x = 396,620.34 × 166,617.28
  4. Step 4: Simplify right side
    287,405.98x = 66,083,802,243.48
  5. Step 5: Solve for x
    x = 66,083,802,243.48/287,405.98
  6. Step 6: Final answer
    x = 229,931.90

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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.