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Finding the Fourth Proportional to 1,329.48, 1,834.34 and 863.64

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Solution

The fourth proportional to 1,329.48, 1,834.34 and 863.64 is: 1,191.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.48 : 1,834.34 = 863.64 : x
  2. Step 2: Convert to fraction form
    1,329.48/1,834.34 = 863.64/x
  3. Step 3: Cross multiply
    1,329.48x = 1,834.34 × 863.64
  4. Step 4: Simplify right side
    1,329.48x = 1,584,209.40
  5. Step 5: Solve for x
    x = 1,584,209.40/1,329.48
  6. Step 6: Final answer
    x = 1,191.60

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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.