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Finding the Fourth Proportional to 4,489.81, 6,728.85 and 2,800.51

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Solution

The fourth proportional to 4,489.81, 6,728.85 and 2,800.51 is: 4,197.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,489.81 : 6,728.85 = 2,800.51 : x
  2. Step 2: Convert to fraction form
    4,489.81/6,728.85 = 2,800.51/x
  3. Step 3: Cross multiply
    4,489.81x = 6,728.85 × 2,800.51
  4. Step 4: Simplify right side
    4,489.81x = 18,844,211.71
  5. Step 5: Solve for x
    x = 18,844,211.71/4,489.81
  6. Step 6: Final answer
    x = 4,197.11

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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.