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Finding the Fourth Proportional to 1,329.75, 1,835.37 and 936.90

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Solution

The fourth proportional to 1,329.75, 1,835.37 and 936.90 is: 1,293.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.75 : 1,835.37 = 936.90 : x
  2. Step 2: Convert to fraction form
    1,329.75/1,835.37 = 936.90/x
  3. Step 3: Cross multiply
    1,329.75x = 1,835.37 × 936.90
  4. Step 4: Simplify right side
    1,329.75x = 1,719,558.15
  5. Step 5: Solve for x
    x = 1,719,558.15/1,329.75
  6. Step 6: Final answer
    x = 1,293.14

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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.