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Finding the Fourth Proportional to 3,999.07, 5,519.10 and 2,989.02

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Solution

The fourth proportional to 3,999.07, 5,519.10 and 2,989.02 is: 4,125.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.07 : 5,519.10 = 2,989.02 : x
  2. Step 2: Convert to fraction form
    3,999.07/5,519.10 = 2,989.02/x
  3. Step 3: Cross multiply
    3,999.07x = 5,519.10 × 2,989.02
  4. Step 4: Simplify right side
    3,999.07x = 16,496,672.69
  5. Step 5: Solve for x
    x = 16,496,672.69/3,999.07
  6. Step 6: Final answer
    x = 4,125.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.