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Finding the Fourth Proportional to 628.91, 942.14 and 411.83

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Solution

The fourth proportional to 628.91, 942.14 and 411.83 is: 616.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.91 : 942.14 = 411.83 : x
  2. Step 2: Convert to fraction form
    628.91/942.14 = 411.83/x
  3. Step 3: Cross multiply
    628.91x = 942.14 × 411.83
  4. Step 4: Simplify right side
    628.91x = 387,997.69
  5. Step 5: Solve for x
    x = 387,997.69/628.91
  6. Step 6: Final answer
    x = 616.94

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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.