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Finding the Fourth Proportional to 680.56, 1,020.78 and 224.56

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Solution

The fourth proportional to 680.56, 1,020.78 and 224.56 is: 336.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.56 : 1,020.78 = 224.56 : x
  2. Step 2: Convert to fraction form
    680.56/1,020.78 = 224.56/x
  3. Step 3: Cross multiply
    680.56x = 1,020.78 × 224.56
  4. Step 4: Simplify right side
    680.56x = 229,226.36
  5. Step 5: Solve for x
    x = 229,226.36/680.56
  6. Step 6: Final answer
    x = 336.82

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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.