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Finding the Fourth Proportional to 381.76, 526.80 and 277

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Solution

The fourth proportional to 381.76, 526.80 and 277 is: 382.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.76 : 526.80 = 277 : x
  2. Step 2: Convert to fraction form
    381.76/526.80 = 277/x
  3. Step 3: Cross multiply
    381.76x = 526.80 × 277
  4. Step 4: Simplify right side
    381.76x = 145,923.60
  5. Step 5: Solve for x
    x = 145,923.60/381.76
  6. Step 6: Final answer
    x = 382.24

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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.