Home / 2,199.64-3,035.10-1,315.78

Finding the Fourth Proportional to 2,199.64, 3,035.10 and 1,315.78

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Solution

The fourth proportional to 2,199.64, 3,035.10 and 1,315.78 is: 1,815.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,199.64 : 3,035.10 = 1,315.78 : x
  2. Step 2: Convert to fraction form
    2,199.64/3,035.10 = 1,315.78/x
  3. Step 3: Cross multiply
    2,199.64x = 3,035.10 × 1,315.78
  4. Step 4: Simplify right side
    2,199.64x = 3,993,523.88
  5. Step 5: Solve for x
    x = 3,993,523.88/2,199.64
  6. Step 6: Final answer
    x = 1,815.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.