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Finding the Fourth Proportional to 275.06, 379.53 and 187.70

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Solution

The fourth proportional to 275.06, 379.53 and 187.70 is: 258.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.06 : 379.53 = 187.70 : x
  2. Step 2: Convert to fraction form
    275.06/379.53 = 187.70/x
  3. Step 3: Cross multiply
    275.06x = 379.53 × 187.70
  4. Step 4: Simplify right side
    275.06x = 71,237.78
  5. Step 5: Solve for x
    x = 71,237.78/275.06
  6. Step 6: Final answer
    x = 258.99

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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.