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Finding the Fourth Proportional to 1,714.28, 2,571.44 and 789.59

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Solution

The fourth proportional to 1,714.28, 2,571.44 and 789.59 is: 1,184.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,714.28 : 2,571.44 = 789.59 : x
  2. Step 2: Convert to fraction form
    1,714.28/2,571.44 = 789.59/x
  3. Step 3: Cross multiply
    1,714.28x = 2,571.44 × 789.59
  4. Step 4: Simplify right side
    1,714.28x = 2,030,366.50
  5. Step 5: Solve for x
    x = 2,030,366.50/1,714.28
  6. Step 6: Final answer
    x = 1,184.39

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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.