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Finding the Fourth Proportional to 1,426.96, 1,966.44 and 960.40

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Solution

The fourth proportional to 1,426.96, 1,966.44 and 960.40 is: 1,323.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.96 : 1,966.44 = 960.40 : x
  2. Step 2: Convert to fraction form
    1,426.96/1,966.44 = 960.40/x
  3. Step 3: Cross multiply
    1,426.96x = 1,966.44 × 960.40
  4. Step 4: Simplify right side
    1,426.96x = 1,888,568.98
  5. Step 5: Solve for x
    x = 1,888,568.98/1,426.96
  6. Step 6: Final answer
    x = 1,323.49

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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.