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Finding the Fourth Proportional to 3,999.61, 5,989.16 and 2,958.05

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Solution

The fourth proportional to 3,999.61, 5,989.16 and 2,958.05 is: 4,429.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.61 : 5,989.16 = 2,958.05 : x
  2. Step 2: Convert to fraction form
    3,999.61/5,989.16 = 2,958.05/x
  3. Step 3: Cross multiply
    3,999.61x = 5,989.16 × 2,958.05
  4. Step 4: Simplify right side
    3,999.61x = 17,716,234.74
  5. Step 5: Solve for x
    x = 17,716,234.74/3,999.61
  6. Step 6: Final answer
    x = 4,429.49

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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.