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Finding the Fourth Proportional to 1,193.88, 1,790.88 and 328.20

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Solution

The fourth proportional to 1,193.88, 1,790.88 and 328.20 is: 492.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,193.88 : 1,790.88 = 328.20 : x
  2. Step 2: Convert to fraction form
    1,193.88/1,790.88 = 328.20/x
  3. Step 3: Cross multiply
    1,193.88x = 1,790.88 × 328.20
  4. Step 4: Simplify right side
    1,193.88x = 587,766.82
  5. Step 5: Solve for x
    x = 587,766.82/1,193.88
  6. Step 6: Final answer
    x = 492.32

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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.