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Finding the Fourth Proportional to 275.13, 379.68 and 158.69

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Solution

The fourth proportional to 275.13, 379.68 and 158.69 is: 218.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.13 : 379.68 = 158.69 : x
  2. Step 2: Convert to fraction form
    275.13/379.68 = 158.69/x
  3. Step 3: Cross multiply
    275.13x = 379.68 × 158.69
  4. Step 4: Simplify right side
    275.13x = 60,250.63
  5. Step 5: Solve for x
    x = 60,250.63/275.13
  6. Step 6: Final answer
    x = 218.99

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.