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Finding the Fourth Proportional to 894.85, 1,234.55 and 684.80

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Solution

The fourth proportional to 894.85, 1,234.55 and 684.80 is: 944.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.85 : 1,234.55 = 684.80 : x
  2. Step 2: Convert to fraction form
    894.85/1,234.55 = 684.80/x
  3. Step 3: Cross multiply
    894.85x = 1,234.55 × 684.80
  4. Step 4: Simplify right side
    894.85x = 845,416.42
  5. Step 5: Solve for x
    x = 845,416.42/894.85
  6. Step 6: Final answer
    x = 944.76

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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.