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Finding the Fourth Proportional to 275.34, 379.53 and 187.86

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Solution

The fourth proportional to 275.34, 379.53 and 187.86 is: 258.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.34 : 379.53 = 187.86 : x
  2. Step 2: Convert to fraction form
    275.34/379.53 = 187.86/x
  3. Step 3: Cross multiply
    275.34x = 379.53 × 187.86
  4. Step 4: Simplify right side
    275.34x = 71,298.51
  5. Step 5: Solve for x
    x = 71,298.51/275.34
  6. Step 6: Final answer
    x = 258.95

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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.