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Finding the Fourth Proportional to 1,999.42, 2,999.14 and 1,267.45

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Solution

The fourth proportional to 1,999.42, 2,999.14 and 1,267.45 is: 1,901.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.42 : 2,999.14 = 1,267.45 : x
  2. Step 2: Convert to fraction form
    1,999.42/2,999.14 = 1,267.45/x
  3. Step 3: Cross multiply
    1,999.42x = 2,999.14 × 1,267.45
  4. Step 4: Simplify right side
    1,999.42x = 3,801,249.33
  5. Step 5: Solve for x
    x = 3,801,249.33/1,999.42
  6. Step 6: Final answer
    x = 1,901.18

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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.