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Finding the Fourth Proportional to 1,999.08, 2,998.14 and 612.12

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Solution

The fourth proportional to 1,999.08, 2,998.14 and 612.12 is: 918.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,999.08 : 2,998.14 = 612.12 : x
  2. Step 2: Convert to fraction form
    1,999.08/2,998.14 = 612.12/x
  3. Step 3: Cross multiply
    1,999.08x = 2,998.14 × 612.12
  4. Step 4: Simplify right side
    1,999.08x = 1,835,221.46
  5. Step 5: Solve for x
    x = 1,835,221.46/1,999.08
  6. Step 6: Final answer
    x = 918.03

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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.