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Finding the Fourth Proportional to 1,786.92, 2,679.24 and 1,056.72

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Solution

The fourth proportional to 1,786.92, 2,679.24 and 1,056.72 is: 1,584.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,786.92 : 2,679.24 = 1,056.72 : x
  2. Step 2: Convert to fraction form
    1,786.92/2,679.24 = 1,056.72/x
  3. Step 3: Cross multiply
    1,786.92x = 2,679.24 × 1,056.72
  4. Step 4: Simplify right side
    1,786.92x = 2,831,206.49
  5. Step 5: Solve for x
    x = 2,831,206.49/1,786.92
  6. Step 6: Final answer
    x = 1,584.41

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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.