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Finding the Fourth Proportional to 1,222.88, 1,685.72 and 960.44

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Solution

The fourth proportional to 1,222.88, 1,685.72 and 960.44 is: 1,323.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,222.88 : 1,685.72 = 960.44 : x
  2. Step 2: Convert to fraction form
    1,222.88/1,685.72 = 960.44/x
  3. Step 3: Cross multiply
    1,222.88x = 1,685.72 × 960.44
  4. Step 4: Simplify right side
    1,222.88x = 1,619,028.11
  5. Step 5: Solve for x
    x = 1,619,028.11/1,222.88
  6. Step 6: Final answer
    x = 1,323.95

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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.