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Finding the Fourth Proportional to 381.23, 525.51 and 276.11

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Solution

The fourth proportional to 381.23, 525.51 and 276.11 is: 380.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.23 : 525.51 = 276.11 : x
  2. Step 2: Convert to fraction form
    381.23/525.51 = 276.11/x
  3. Step 3: Cross multiply
    381.23x = 525.51 × 276.11
  4. Step 4: Simplify right side
    381.23x = 145,095.94
  5. Step 5: Solve for x
    x = 145,095.94/381.23
  6. Step 6: Final answer
    x = 380.60

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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.