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Finding the Fourth Proportional to 1,241.12, 1,709.94 and 960.39

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Solution

The fourth proportional to 1,241.12, 1,709.94 and 960.39 is: 1,323.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,241.12 : 1,709.94 = 960.39 : x
  2. Step 2: Convert to fraction form
    1,241.12/1,709.94 = 960.39/x
  3. Step 3: Cross multiply
    1,241.12x = 1,709.94 × 960.39
  4. Step 4: Simplify right side
    1,241.12x = 1,642,212.88
  5. Step 5: Solve for x
    x = 1,642,212.88/1,241.12
  6. Step 6: Final answer
    x = 1,323.17

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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.