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Finding the Fourth Proportional to 275.15, 412.72 and 112.84

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Solution

The fourth proportional to 275.15, 412.72 and 112.84 is: 169.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.15 : 412.72 = 112.84 : x
  2. Step 2: Convert to fraction form
    275.15/412.72 = 112.84/x
  3. Step 3: Cross multiply
    275.15x = 412.72 × 112.84
  4. Step 4: Simplify right side
    275.15x = 46,570.01
  5. Step 5: Solve for x
    x = 46,570.01/275.15
  6. Step 6: Final answer
    x = 169.25

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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.