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Finding the Fourth Proportional to 628.03, 940.78 and 353.71

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Solution

The fourth proportional to 628.03, 940.78 and 353.71 is: 529.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.03 : 940.78 = 353.71 : x
  2. Step 2: Convert to fraction form
    628.03/940.78 = 353.71/x
  3. Step 3: Cross multiply
    628.03x = 940.78 × 353.71
  4. Step 4: Simplify right side
    628.03x = 332,756.82
  5. Step 5: Solve for x
    x = 332,756.82/628.03
  6. Step 6: Final answer
    x = 529.85

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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.