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Finding the Fourth Proportional to 2,751.76, 4,127.46 and 803.80

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Solution

The fourth proportional to 2,751.76, 4,127.46 and 803.80 is: 1,205.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,751.76 : 4,127.46 = 803.80 : x
  2. Step 2: Convert to fraction form
    2,751.76/4,127.46 = 803.80/x
  3. Step 3: Cross multiply
    2,751.76x = 4,127.46 × 803.80
  4. Step 4: Simplify right side
    2,751.76x = 3,317,652.35
  5. Step 5: Solve for x
    x = 3,317,652.35/2,751.76
  6. Step 6: Final answer
    x = 1,205.65

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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.