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Finding the Fourth Proportional to 295.40, 443.12 and 112.80

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Solution

The fourth proportional to 295.40, 443.12 and 112.80 is: 169.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    295.40 : 443.12 = 112.80 : x
  2. Step 2: Convert to fraction form
    295.40/443.12 = 112.80/x
  3. Step 3: Cross multiply
    295.40x = 443.12 × 112.80
  4. Step 4: Simplify right side
    295.40x = 49,983.94
  5. Step 5: Solve for x
    x = 49,983.94/295.40
  6. Step 6: Final answer
    x = 169.21

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.