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Finding the Fourth Proportional to 275.18, 381.55 and 260.60

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Solution

The fourth proportional to 275.18, 381.55 and 260.60 is: 361.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    275.18 : 381.55 = 260.60 : x
  2. Step 2: Convert to fraction form
    275.18/381.55 = 260.60/x
  3. Step 3: Cross multiply
    275.18x = 381.55 × 260.60
  4. Step 4: Simplify right side
    275.18x = 99,431.93
  5. Step 5: Solve for x
    x = 99,431.93/275.18
  6. Step 6: Final answer
    x = 361.33

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.