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Finding the Fourth Proportional to 3,999.89, 5,520.38 and 2,428.01

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Solution

The fourth proportional to 3,999.89, 5,520.38 and 2,428.01 is: 3,350.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,999.89 : 5,520.38 = 2,428.01 : x
  2. Step 2: Convert to fraction form
    3,999.89/5,520.38 = 2,428.01/x
  3. Step 3: Cross multiply
    3,999.89x = 5,520.38 × 2,428.01
  4. Step 4: Simplify right side
    3,999.89x = 13,403,498.10
  5. Step 5: Solve for x
    x = 13,403,498.10/3,999.89
  6. Step 6: Final answer
    x = 3,350.97

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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.