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Finding the Fourth Proportional to 1,999.74, 2,998.08 and 1,381.68

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Solution

The fourth proportional to 1,999.74, 2,998.08 and 1,381.68 is: 2,071.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.74 : 2,998.08 = 1,381.68 : x
  2. Step 2: Convert to fraction form
    1,999.74/2,998.08 = 1,381.68/x
  3. Step 3: Cross multiply
    1,999.74x = 2,998.08 × 1,381.68
  4. Step 4: Simplify right side
    1,999.74x = 4,142,387.17
  5. Step 5: Solve for x
    x = 4,142,387.17/1,999.74
  6. Step 6: Final answer
    x = 2,071.46

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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.