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Finding the Fourth Proportional to 3,948.99, 5,920.73 and 1,999.86

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Solution

The fourth proportional to 3,948.99, 5,920.73 and 1,999.86 is: 2,998.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,948.99 : 5,920.73 = 1,999.86 : x
  2. Step 2: Convert to fraction form
    3,948.99/5,920.73 = 1,999.86/x
  3. Step 3: Cross multiply
    3,948.99x = 5,920.73 × 1,999.86
  4. Step 4: Simplify right side
    3,948.99x = 11,840,631.10
  5. Step 5: Solve for x
    x = 11,840,631.10/3,948.99
  6. Step 6: Final answer
    x = 2,998.39

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1.5x scale

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.