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Finding the Fourth Proportional to 1,185.40, 1,778.36 and 454.97

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Solution

The fourth proportional to 1,185.40, 1,778.36 and 454.97 is: 682.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,185.40 : 1,778.36 = 454.97 : x
  2. Step 2: Convert to fraction form
    1,185.40/1,778.36 = 454.97/x
  3. Step 3: Cross multiply
    1,185.40x = 1,778.36 × 454.97
  4. Step 4: Simplify right side
    1,185.40x = 809,098.17
  5. Step 5: Solve for x
    x = 809,098.17/1,185.40
  6. Step 6: Final answer
    x = 682.56

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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.