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Finding the Fourth Proportional to 2,783.93, 4,172.29 and 2,489.81

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Solution

The fourth proportional to 2,783.93, 4,172.29 and 2,489.81 is: 3,731.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,783.93 : 4,172.29 = 2,489.81 : x
  2. Step 2: Convert to fraction form
    2,783.93/4,172.29 = 2,489.81/x
  3. Step 3: Cross multiply
    2,783.93x = 4,172.29 × 2,489.81
  4. Step 4: Simplify right side
    2,783.93x = 10,388,182.28
  5. Step 5: Solve for x
    x = 10,388,182.28/2,783.93
  6. Step 6: Final answer
    x = 3,731.49

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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.