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Finding the Fourth Proportional to 1,999.59, 2,759.85 and 1,371.39

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Solution

The fourth proportional to 1,999.59, 2,759.85 and 1,371.39 is: 1,892.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.59 : 2,759.85 = 1,371.39 : x
  2. Step 2: Convert to fraction form
    1,999.59/2,759.85 = 1,371.39/x
  3. Step 3: Cross multiply
    1,999.59x = 2,759.85 × 1,371.39
  4. Step 4: Simplify right side
    1,999.59x = 3,784,830.69
  5. Step 5: Solve for x
    x = 3,784,830.69/1,999.59
  6. Step 6: Final answer
    x = 1,892.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.