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Finding the Fourth Proportional to 1,879.12, 2,818.84 and 783.44

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Solution

The fourth proportional to 1,879.12, 2,818.84 and 783.44 is: 1,175.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,879.12 : 2,818.84 = 783.44 : x
  2. Step 2: Convert to fraction form
    1,879.12/2,818.84 = 783.44/x
  3. Step 3: Cross multiply
    1,879.12x = 2,818.84 × 783.44
  4. Step 4: Simplify right side
    1,879.12x = 2,208,392.01
  5. Step 5: Solve for x
    x = 2,208,392.01/1,879.12
  6. Step 6: Final answer
    x = 1,175.23

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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.