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Finding the Fourth Proportional to 1,188.97, 1,783.18 and 323.35

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Solution

The fourth proportional to 1,188.97, 1,783.18 and 323.35 is: 484.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188.97 : 1,783.18 = 323.35 : x
  2. Step 2: Convert to fraction form
    1,188.97/1,783.18 = 323.35/x
  3. Step 3: Cross multiply
    1,188.97x = 1,783.18 × 323.35
  4. Step 4: Simplify right side
    1,188.97x = 576,591.25
  5. Step 5: Solve for x
    x = 576,591.25/1,188.97
  6. Step 6: Final answer
    x = 484.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.