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Finding the Fourth Proportional to 960.68, 1,324.15 and 680.56

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Solution

The fourth proportional to 960.68, 1,324.15 and 680.56 is: 938.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    960.68 : 1,324.15 = 680.56 : x
  2. Step 2: Convert to fraction form
    960.68/1,324.15 = 680.56/x
  3. Step 3: Cross multiply
    960.68x = 1,324.15 × 680.56
  4. Step 4: Simplify right side
    960.68x = 901,163.52
  5. Step 5: Solve for x
    x = 901,163.52/960.68
  6. Step 6: Final answer
    x = 938.05

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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.