Home / 2,838.15-4,254.30-1,278.90

Finding the Fourth Proportional to 2,838.15, 4,254.30 and 1,278.90

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Solution

The fourth proportional to 2,838.15, 4,254.30 and 1,278.90 is: 1,917.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,838.15 : 4,254.30 = 1,278.90 : x
  2. Step 2: Convert to fraction form
    2,838.15/4,254.30 = 1,278.90/x
  3. Step 3: Cross multiply
    2,838.15x = 4,254.30 × 1,278.90
  4. Step 4: Simplify right side
    2,838.15x = 5,440,824.27
  5. Step 5: Solve for x
    x = 5,440,824.27/2,838.15
  6. Step 6: Final answer
    x = 1,917.03

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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.