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Finding the Fourth Proportional to 283.40, 389.94 and 276.92

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Solution

The fourth proportional to 283.40, 389.94 and 276.92 is: 381.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.40 : 389.94 = 276.92 : x
  2. Step 2: Convert to fraction form
    283.40/389.94 = 276.92/x
  3. Step 3: Cross multiply
    283.40x = 389.94 × 276.92
  4. Step 4: Simplify right side
    283.40x = 107,982.18
  5. Step 5: Solve for x
    x = 107,982.18/283.40
  6. Step 6: Final answer
    x = 381.02

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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.