Home / 2,761.02-3,808.35-1,921.86

Finding the Fourth Proportional to 2,761.02, 3,808.35 and 1,921.86

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Solution

The fourth proportional to 2,761.02, 3,808.35 and 1,921.86 is: 2,650.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,761.02 : 3,808.35 = 1,921.86 : x
  2. Step 2: Convert to fraction form
    2,761.02/3,808.35 = 1,921.86/x
  3. Step 3: Cross multiply
    2,761.02x = 3,808.35 × 1,921.86
  4. Step 4: Simplify right side
    2,761.02x = 7,319,115.53
  5. Step 5: Solve for x
    x = 7,319,115.53/2,761.02
  6. Step 6: Final answer
    x = 2,650.87

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.