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Finding the Fourth Proportional to 1,847.21, 2,770.80 and 751.31

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Solution

The fourth proportional to 1,847.21, 2,770.80 and 751.31 is: 1,126.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,847.21 : 2,770.80 = 751.31 : x
  2. Step 2: Convert to fraction form
    1,847.21/2,770.80 = 751.31/x
  3. Step 3: Cross multiply
    1,847.21x = 2,770.80 × 751.31
  4. Step 4: Simplify right side
    1,847.21x = 2,081,729.75
  5. Step 5: Solve for x
    x = 2,081,729.75/1,847.21
  6. Step 6: Final answer
    x = 1,126.96

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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.