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Finding the Fourth Proportional to 275.72, 380.57 and 188.44

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Solution

The fourth proportional to 275.72, 380.57 and 188.44 is: 260.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.72 : 380.57 = 188.44 : x
  2. Step 2: Convert to fraction form
    275.72/380.57 = 188.44/x
  3. Step 3: Cross multiply
    275.72x = 380.57 × 188.44
  4. Step 4: Simplify right side
    275.72x = 71,714.61
  5. Step 5: Solve for x
    x = 71,714.61/275.72
  6. Step 6: Final answer
    x = 260.10

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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.