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Finding the Fourth Proportional to 280.08, 388.46 and 276.84

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Solution

The fourth proportional to 280.08, 388.46 and 276.84 is: 383.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.08 : 388.46 = 276.84 : x
  2. Step 2: Convert to fraction form
    280.08/388.46 = 276.84/x
  3. Step 3: Cross multiply
    280.08x = 388.46 × 276.84
  4. Step 4: Simplify right side
    280.08x = 107,541.27
  5. Step 5: Solve for x
    x = 107,541.27/280.08
  6. Step 6: Final answer
    x = 383.97

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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.