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Finding the Fourth Proportional to 2,751.67, 4,128.26 and 803.86

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Solution

The fourth proportional to 2,751.67, 4,128.26 and 803.86 is: 1,206.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,751.67 : 4,128.26 = 803.86 : x
  2. Step 2: Convert to fraction form
    2,751.67/4,128.26 = 803.86/x
  3. Step 3: Cross multiply
    2,751.67x = 4,128.26 × 803.86
  4. Step 4: Simplify right side
    2,751.67x = 3,318,543.08
  5. Step 5: Solve for x
    x = 3,318,543.08/2,751.67
  6. Step 6: Final answer
    x = 1,206.01

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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.