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Finding the Fourth Proportional to 1,879.56, 2,820.60 and 783.93

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Solution

The fourth proportional to 1,879.56, 2,820.60 and 783.93 is: 1,176.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,879.56 : 2,820.60 = 783.93 : x
  2. Step 2: Convert to fraction form
    1,879.56/2,820.60 = 783.93/x
  3. Step 3: Cross multiply
    1,879.56x = 2,820.60 × 783.93
  4. Step 4: Simplify right side
    1,879.56x = 2,211,152.96
  5. Step 5: Solve for x
    x = 2,211,152.96/1,879.56
  6. Step 6: Final answer
    x = 1,176.42

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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.