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Finding the Fourth Proportional to 3,879.07, 5,818.90 and 2,851.18

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Solution

The fourth proportional to 3,879.07, 5,818.90 and 2,851.18 is: 4,276.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.07 : 5,818.90 = 2,851.18 : x
  2. Step 2: Convert to fraction form
    3,879.07/5,818.90 = 2,851.18/x
  3. Step 3: Cross multiply
    3,879.07x = 5,818.90 × 2,851.18
  4. Step 4: Simplify right side
    3,879.07x = 16,590,731.30
  5. Step 5: Solve for x
    x = 16,590,731.30/3,879.07
  6. Step 6: Final answer
    x = 4,276.99

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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.