Home / 2,213.80-3,320.70-1,861.45

Finding the Fourth Proportional to 2,213.80, 3,320.70 and 1,861.45

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Solution

The fourth proportional to 2,213.80, 3,320.70 and 1,861.45 is: 2,792.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,213.80 : 3,320.70 = 1,861.45 : x
  2. Step 2: Convert to fraction form
    2,213.80/3,320.70 = 1,861.45/x
  3. Step 3: Cross multiply
    2,213.80x = 3,320.70 × 1,861.45
  4. Step 4: Simplify right side
    2,213.80x = 6,181,317.02
  5. Step 5: Solve for x
    x = 6,181,317.02/2,213.80
  6. Step 6: Final answer
    x = 2,792.18

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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.