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Finding the Fourth Proportional to 287,558.65, 396,860.45 and 172,874.41

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Solution

The fourth proportional to 287,558.65, 396,860.45 and 172,874.41 is: 238,584.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,558.65 : 396,860.45 = 172,874.41 : x
  2. Step 2: Convert to fraction form
    287,558.65/396,860.45 = 172,874.41/x
  3. Step 3: Cross multiply
    287,558.65x = 396,860.45 × 172,874.41
  4. Step 4: Simplify right side
    287,558.65x = 68,607,016,146.08
  5. Step 5: Solve for x
    x = 68,607,016,146.08/287,558.65
  6. Step 6: Final answer
    x = 238,584.43

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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.