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Finding the Fourth Proportional to 381.67, 526.56 and 276.67

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Solution

The fourth proportional to 381.67, 526.56 and 276.67 is: 381.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.67 : 526.56 = 276.67 : x
  2. Step 2: Convert to fraction form
    381.67/526.56 = 276.67/x
  3. Step 3: Cross multiply
    381.67x = 526.56 × 276.67
  4. Step 4: Simplify right side
    381.67x = 145,683.36
  5. Step 5: Solve for x
    x = 145,683.36/381.67
  6. Step 6: Final answer
    x = 381.70

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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.