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Finding the Fourth Proportional to 1,937.80, 2,905.87 and 1,321.99

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Solution

The fourth proportional to 1,937.80, 2,905.87 and 1,321.99 is: 1,982.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,937.80 : 2,905.87 = 1,321.99 : x
  2. Step 2: Convert to fraction form
    1,937.80/2,905.87 = 1,321.99/x
  3. Step 3: Cross multiply
    1,937.80x = 2,905.87 × 1,321.99
  4. Step 4: Simplify right side
    1,937.80x = 3,841,531.08
  5. Step 5: Solve for x
    x = 3,841,531.08/1,937.80
  6. Step 6: Final answer
    x = 1,982.42

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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.