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Finding the Fourth Proportional to 275.63, 380.75 and 197.19

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Solution

The fourth proportional to 275.63, 380.75 and 197.19 is: 272.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.63 : 380.75 = 197.19 : x
  2. Step 2: Convert to fraction form
    275.63/380.75 = 197.19/x
  3. Step 3: Cross multiply
    275.63x = 380.75 × 197.19
  4. Step 4: Simplify right side
    275.63x = 75,079.11
  5. Step 5: Solve for x
    x = 75,079.11/275.63
  6. Step 6: Final answer
    x = 272.40

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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.