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Finding the Fourth Proportional to 287,325.09, 396,568.58 and 172,609.11

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Solution

The fourth proportional to 287,325.09, 396,568.58 and 172,609.11 is: 238,236.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,325.09 : 396,568.58 = 172,609.11 : x
  2. Step 2: Convert to fraction form
    287,325.09/396,568.58 = 172,609.11/x
  3. Step 3: Cross multiply
    287,325.09x = 396,568.58 × 172,609.11
  4. Step 4: Simplify right side
    287,325.09x = 68,451,348,784.72
  5. Step 5: Solve for x
    x = 68,451,348,784.72/287,325.09
  6. Step 6: Final answer
    x = 238,236.59

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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.