Home / 3,457.20-5,185.05-991.98

Finding the Fourth Proportional to 3,457.20, 5,185.05 and 991.98

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Solution

The fourth proportional to 3,457.20, 5,185.05 and 991.98 is: 1,487.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,457.20 : 5,185.05 = 991.98 : x
  2. Step 2: Convert to fraction form
    3,457.20/5,185.05 = 991.98/x
  3. Step 3: Cross multiply
    3,457.20x = 5,185.05 × 991.98
  4. Step 4: Simplify right side
    3,457.20x = 5,143,465.90
  5. Step 5: Solve for x
    x = 5,143,465.90/3,457.20
  6. Step 6: Final answer
    x = 1,487.75

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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.