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Finding the Fourth Proportional to 628.69, 943.03 and 281.94

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Solution

The fourth proportional to 628.69, 943.03 and 281.94 is: 422.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.69 : 943.03 = 281.94 : x
  2. Step 2: Convert to fraction form
    628.69/943.03 = 281.94/x
  3. Step 3: Cross multiply
    628.69x = 943.03 × 281.94
  4. Step 4: Simplify right side
    628.69x = 265,880.93
  5. Step 5: Solve for x
    x = 265,880.93/628.69
  6. Step 6: Final answer
    x = 422.91

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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.