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Finding the Fourth Proportional to 1,318.86, 1,817.37 and 968.94

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Solution

The fourth proportional to 1,318.86, 1,817.37 and 968.94 is: 1,335.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,318.86 : 1,817.37 = 968.94 : x
  2. Step 2: Convert to fraction form
    1,318.86/1,817.37 = 968.94/x
  3. Step 3: Cross multiply
    1,318.86x = 1,817.37 × 968.94
  4. Step 4: Simplify right side
    1,318.86x = 1,760,922.49
  5. Step 5: Solve for x
    x = 1,760,922.49/1,318.86
  6. Step 6: Final answer
    x = 1,335.19

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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.