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Finding the Fourth Proportional to 287,435.88, 396,665.64 and 166,585.50

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Solution

The fourth proportional to 287,435.88, 396,665.64 and 166,585.50 is: 229,890.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,435.88 : 396,665.64 = 166,585.50 : x
  2. Step 2: Convert to fraction form
    287,435.88/396,665.64 = 166,585.50/x
  3. Step 3: Cross multiply
    287,435.88x = 396,665.64 × 166,585.50
  4. Step 4: Simplify right side
    287,435.88x = 66,078,743,972.22
  5. Step 5: Solve for x
    x = 66,078,743,972.22/287,435.88
  6. Step 6: Final answer
    x = 229,890.38

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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.