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Finding the Fourth Proportional to 287,135.20, 396,243.12 and 167,903.20

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Solution

The fourth proportional to 287,135.20, 396,243.12 and 167,903.20 is: 231,704.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,135.20 : 396,243.12 = 167,903.20 : x
  2. Step 2: Convert to fraction form
    287,135.20/396,243.12 = 167,903.20/x
  3. Step 3: Cross multiply
    287,135.20x = 396,243.12 × 167,903.20
  4. Step 4: Simplify right side
    287,135.20x = 66,530,487,825.98
  5. Step 5: Solve for x
    x = 66,530,487,825.98/287,135.20
  6. Step 6: Final answer
    x = 231,704.40

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1.5x scale

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.