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Finding the Fourth Proportional to 287,589.96, 396,903.80 and 172,906.08

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Solution

The fourth proportional to 287,589.96, 396,903.80 and 172,906.08 is: 238,628.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,589.96 : 396,903.80 = 172,906.08 : x
  2. Step 2: Convert to fraction form
    287,589.96/396,903.80 = 172,906.08/x
  3. Step 3: Cross multiply
    287,589.96x = 396,903.80 × 172,906.08
  4. Step 4: Simplify right side
    287,589.96x = 68,627,080,195.10
  5. Step 5: Solve for x
    x = 68,627,080,195.10/287,589.96
  6. Step 6: Final answer
    x = 238,628.22

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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.