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Finding the Fourth Proportional to 275.70, 380.76 and 223.80

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Solution

The fourth proportional to 275.70, 380.76 and 223.80 is: 309.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.70 : 380.76 = 223.80 : x
  2. Step 2: Convert to fraction form
    275.70/380.76 = 223.80/x
  3. Step 3: Cross multiply
    275.70x = 380.76 × 223.80
  4. Step 4: Simplify right side
    275.70x = 85,214.09
  5. Step 5: Solve for x
    x = 85,214.09/275.70
  6. Step 6: Final answer
    x = 309.08

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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.