Home / 4,912.60-7,369.80-1,991.20

Finding the Fourth Proportional to 4,912.60, 7,369.80 and 1,991.20

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Solution

The fourth proportional to 4,912.60, 7,369.80 and 1,991.20 is: 2,987.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,912.60 : 7,369.80 = 1,991.20 : x
  2. Step 2: Convert to fraction form
    4,912.60/7,369.80 = 1,991.20/x
  3. Step 3: Cross multiply
    4,912.60x = 7,369.80 × 1,991.20
  4. Step 4: Simplify right side
    4,912.60x = 14,674,745.76
  5. Step 5: Solve for x
    x = 14,674,745.76/4,912.60
  6. Step 6: Final answer
    x = 2,987.16

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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.