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Finding the Fourth Proportional to 275.79, 380.76 and 210.18

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Solution

The fourth proportional to 275.79, 380.76 and 210.18 is: 290.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.79 : 380.76 = 210.18 : x
  2. Step 2: Convert to fraction form
    275.79/380.76 = 210.18/x
  3. Step 3: Cross multiply
    275.79x = 380.76 × 210.18
  4. Step 4: Simplify right side
    275.79x = 80,028.14
  5. Step 5: Solve for x
    x = 80,028.14/275.79
  6. Step 6: Final answer
    x = 290.18

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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.