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Finding the Fourth Proportional to 1,204.56, 1,662.40 and 680.68

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Solution

The fourth proportional to 1,204.56, 1,662.40 and 680.68 is: 939.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,204.56 : 1,662.40 = 680.68 : x
  2. Step 2: Convert to fraction form
    1,204.56/1,662.40 = 680.68/x
  3. Step 3: Cross multiply
    1,204.56x = 1,662.40 × 680.68
  4. Step 4: Simplify right side
    1,204.56x = 1,131,562.43
  5. Step 5: Solve for x
    x = 1,131,562.43/1,204.56
  6. Step 6: Final answer
    x = 939.40

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1.5x scale

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.