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Finding the Fourth Proportional to 275.94, 380.90 and 188.66

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Solution

The fourth proportional to 275.94, 380.90 and 188.66 is: 260.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.94 : 380.90 = 188.66 : x
  2. Step 2: Convert to fraction form
    275.94/380.90 = 188.66/x
  3. Step 3: Cross multiply
    275.94x = 380.90 × 188.66
  4. Step 4: Simplify right side
    275.94x = 71,860.59
  5. Step 5: Solve for x
    x = 71,860.59/275.94
  6. Step 6: Final answer
    x = 260.42

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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.