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Finding the Fourth Proportional to 275.94, 380.77 and 157.90

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Solution

The fourth proportional to 275.94, 380.77 and 157.90 is: 217.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.94 : 380.77 = 157.90 : x
  2. Step 2: Convert to fraction form
    275.94/380.77 = 157.90/x
  3. Step 3: Cross multiply
    275.94x = 380.77 × 157.90
  4. Step 4: Simplify right side
    275.94x = 60,123.58
  5. Step 5: Solve for x
    x = 60,123.58/275.94
  6. Step 6: Final answer
    x = 217.89

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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.