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Finding the Fourth Proportional to 295.39, 443.09 and 112.80

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Solution

The fourth proportional to 295.39, 443.09 and 112.80 is: 169.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    295.39 : 443.09 = 112.80 : x
  2. Step 2: Convert to fraction form
    295.39/443.09 = 112.80/x
  3. Step 3: Cross multiply
    295.39x = 443.09 × 112.80
  4. Step 4: Simplify right side
    295.39x = 49,980.83
  5. Step 5: Solve for x
    x = 49,980.83/295.39
  6. Step 6: Final answer
    x = 169.20

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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.