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Finding the Fourth Proportional to 1,999.61, 2,759.04 and 1,160.21

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Solution

The fourth proportional to 1,999.61, 2,759.04 and 1,160.21 is: 1,600.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.61 : 2,759.04 = 1,160.21 : x
  2. Step 2: Convert to fraction form
    1,999.61/2,759.04 = 1,160.21/x
  3. Step 3: Cross multiply
    1,999.61x = 2,759.04 × 1,160.21
  4. Step 4: Simplify right side
    1,999.61x = 3,201,060.49
  5. Step 5: Solve for x
    x = 3,201,060.49/1,999.61
  6. Step 6: Final answer
    x = 1,600.84

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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.