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Finding the Fourth Proportional to 287,326.72, 396,320.88 and 179,709.92

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Solution

The fourth proportional to 287,326.72, 396,320.88 and 179,709.92 is: 247,880.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,326.72 : 396,320.88 = 179,709.92 : x
  2. Step 2: Convert to fraction form
    287,326.72/396,320.88 = 179,709.92/x
  3. Step 3: Cross multiply
    287,326.72x = 396,320.88 × 179,709.92
  4. Step 4: Simplify right side
    287,326.72x = 71,222,793,639.13
  5. Step 5: Solve for x
    x = 71,222,793,639.13/287,326.72
  6. Step 6: Final answer
    x = 247,880.86

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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.