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Finding the Fourth Proportional to 3,323.90, 4,989.90 and 1,679.60

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Solution

The fourth proportional to 3,323.90, 4,989.90 and 1,679.60 is: 2,521.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,323.90 : 4,989.90 = 1,679.60 : x
  2. Step 2: Convert to fraction form
    3,323.90/4,989.90 = 1,679.60/x
  3. Step 3: Cross multiply
    3,323.90x = 4,989.90 × 1,679.60
  4. Step 4: Simplify right side
    3,323.90x = 8,381,036.04
  5. Step 5: Solve for x
    x = 8,381,036.04/3,323.90
  6. Step 6: Final answer
    x = 2,521.45

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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.