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Finding the Fourth Proportional to 3,851.76, 5,779.32 and 1,659.96

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Solution

The fourth proportional to 3,851.76, 5,779.32 and 1,659.96 is: 2,490.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,851.76 : 5,779.32 = 1,659.96 : x
  2. Step 2: Convert to fraction form
    3,851.76/5,779.32 = 1,659.96/x
  3. Step 3: Cross multiply
    3,851.76x = 5,779.32 × 1,659.96
  4. Step 4: Simplify right side
    3,851.76x = 9,593,440.03
  5. Step 5: Solve for x
    x = 9,593,440.03/3,851.76
  6. Step 6: Final answer
    x = 2,490.66

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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.