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Finding the Fourth Proportional to 3,392.79, 5,090.01 and 1,722.81

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Solution

The fourth proportional to 3,392.79, 5,090.01 and 1,722.81 is: 2,584.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,392.79 : 5,090.01 = 1,722.81 : x
  2. Step 2: Convert to fraction form
    3,392.79/5,090.01 = 1,722.81/x
  3. Step 3: Cross multiply
    3,392.79x = 5,090.01 × 1,722.81
  4. Step 4: Simplify right side
    3,392.79x = 8,769,113.67
  5. Step 5: Solve for x
    x = 8,769,113.67/3,392.79
  6. Step 6: Final answer
    x = 2,584.63

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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.