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Finding the Fourth Proportional to 2,173.59, 3,260.66 and 712.89

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Solution

The fourth proportional to 2,173.59, 3,260.66 and 712.89 is: 1,069.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,173.59 : 3,260.66 = 712.89 : x
  2. Step 2: Convert to fraction form
    2,173.59/3,260.66 = 712.89/x
  3. Step 3: Cross multiply
    2,173.59x = 3,260.66 × 712.89
  4. Step 4: Simplify right side
    2,173.59x = 2,324,488.34
  5. Step 5: Solve for x
    x = 2,324,488.34/2,173.59
  6. Step 6: Final answer
    x = 1,069.42

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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.