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Finding the Fourth Proportional to 628.56, 943.39 and 299.90

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Solution

The fourth proportional to 628.56, 943.39 and 299.90 is: 450.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.56 : 943.39 = 299.90 : x
  2. Step 2: Convert to fraction form
    628.56/943.39 = 299.90/x
  3. Step 3: Cross multiply
    628.56x = 943.39 × 299.90
  4. Step 4: Simplify right side
    628.56x = 282,922.66
  5. Step 5: Solve for x
    x = 282,922.66/628.56
  6. Step 6: Final answer
    x = 450.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.