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Finding the Fourth Proportional to 3,326.33, 4,989.90 and 986.46

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Solution

The fourth proportional to 3,326.33, 4,989.90 and 986.46 is: 1,479.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,326.33 : 4,989.90 = 986.46 : x
  2. Step 2: Convert to fraction form
    3,326.33/4,989.90 = 986.46/x
  3. Step 3: Cross multiply
    3,326.33x = 4,989.90 × 986.46
  4. Step 4: Simplify right side
    3,326.33x = 4,922,336.75
  5. Step 5: Solve for x
    x = 4,922,336.75/3,326.33
  6. Step 6: Final answer
    x = 1,479.81

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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.