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Finding the Fourth Proportional to 1,778.41, 2,454.30 and 992.44

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Solution

The fourth proportional to 1,778.41, 2,454.30 and 992.44 is: 1,369.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.41 : 2,454.30 = 992.44 : x
  2. Step 2: Convert to fraction form
    1,778.41/2,454.30 = 992.44/x
  3. Step 3: Cross multiply
    1,778.41x = 2,454.30 × 992.44
  4. Step 4: Simplify right side
    1,778.41x = 2,435,745.49
  5. Step 5: Solve for x
    x = 2,435,745.49/1,778.41
  6. Step 6: Final answer
    x = 1,369.62

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1.5x scale

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.