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Finding the Fourth Proportional to 894.15, 1,234.17 and 628.65

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Solution

The fourth proportional to 894.15, 1,234.17 and 628.65 is: 867.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.15 : 1,234.17 = 628.65 : x
  2. Step 2: Convert to fraction form
    894.15/1,234.17 = 628.65/x
  3. Step 3: Cross multiply
    894.15x = 1,234.17 × 628.65
  4. Step 4: Simplify right side
    894.15x = 775,856.34
  5. Step 5: Solve for x
    x = 775,856.34/894.15
  6. Step 6: Final answer
    x = 867.71

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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.