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Finding the Fourth Proportional to 1,879.09, 2,818.56 and 492.40

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Solution

The fourth proportional to 1,879.09, 2,818.56 and 492.40 is: 738.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,879.09 : 2,818.56 = 492.40 : x
  2. Step 2: Convert to fraction form
    1,879.09/2,818.56 = 492.40/x
  3. Step 3: Cross multiply
    1,879.09x = 2,818.56 × 492.40
  4. Step 4: Simplify right side
    1,879.09x = 1,387,849.44
  5. Step 5: Solve for x
    x = 1,387,849.44/1,879.09
  6. Step 6: Final answer
    x = 738.57

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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.