Home / 2,812.45-4,219.53-1,992.31

Finding the Fourth Proportional to 2,812.45, 4,219.53 and 1,992.31

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Solution

The fourth proportional to 2,812.45, 4,219.53 and 1,992.31 is: 2,989.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.45 : 4,219.53 = 1,992.31 : x
  2. Step 2: Convert to fraction form
    2,812.45/4,219.53 = 1,992.31/x
  3. Step 3: Cross multiply
    2,812.45x = 4,219.53 × 1,992.31
  4. Step 4: Simplify right side
    2,812.45x = 8,406,611.81
  5. Step 5: Solve for x
    x = 8,406,611.81/2,812.45
  6. Step 6: Final answer
    x = 2,989.07

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1.5x scale

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.