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Finding the Fourth Proportional to 283.38, 389.75 and 228.03

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Solution

The fourth proportional to 283.38, 389.75 and 228.03 is: 313.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    283.38 : 389.75 = 228.03 : x
  2. Step 2: Convert to fraction form
    283.38/389.75 = 228.03/x
  3. Step 3: Cross multiply
    283.38x = 389.75 × 228.03
  4. Step 4: Simplify right side
    283.38x = 88,874.69
  5. Step 5: Solve for x
    x = 88,874.69/283.38
  6. Step 6: Final answer
    x = 313.62

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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.