Home / 2,761.02-4,141.80-911.70

Finding the Fourth Proportional to 2,761.02, 4,141.80 and 911.70

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Solution

The fourth proportional to 2,761.02, 4,141.80 and 911.70 is: 1,367.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,761.02 : 4,141.80 = 911.70 : x
  2. Step 2: Convert to fraction form
    2,761.02/4,141.80 = 911.70/x
  3. Step 3: Cross multiply
    2,761.02x = 4,141.80 × 911.70
  4. Step 4: Simplify right side
    2,761.02x = 3,776,079.06
  5. Step 5: Solve for x
    x = 3,776,079.06/2,761.02
  6. Step 6: Final answer
    x = 1,367.64

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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.