Home / 2,145.50-3,218.23-1,409.75

Finding the Fourth Proportional to 2,145.50, 3,218.23 and 1,409.75

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Solution

The fourth proportional to 2,145.50, 3,218.23 and 1,409.75 is: 2,114.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,145.50 : 3,218.23 = 1,409.75 : x
  2. Step 2: Convert to fraction form
    2,145.50/3,218.23 = 1,409.75/x
  3. Step 3: Cross multiply
    2,145.50x = 3,218.23 × 1,409.75
  4. Step 4: Simplify right side
    2,145.50x = 4,536,880.13
  5. Step 5: Solve for x
    x = 4,536,880.13/2,145.50
  6. Step 6: Final answer
    x = 2,114.61

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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.