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Finding the Fourth Proportional to 381.60, 526.26 and 276.30

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Solution

The fourth proportional to 381.60, 526.26 and 276.30 is: 381.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.60 : 526.26 = 276.30 : x
  2. Step 2: Convert to fraction form
    381.60/526.26 = 276.30/x
  3. Step 3: Cross multiply
    381.60x = 526.26 × 276.30
  4. Step 4: Simplify right side
    381.60x = 145,406.67
  5. Step 5: Solve for x
    x = 145,406.67/381.60
  6. Step 6: Final answer
    x = 381.04

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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.