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Finding the Fourth Proportional to 2,173.70, 3,260.55 and 712.90

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Solution

The fourth proportional to 2,173.70, 3,260.55 and 712.90 is: 1,069.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,173.70 : 3,260.55 = 712.90 : x
  2. Step 2: Convert to fraction form
    2,173.70/3,260.55 = 712.90/x
  3. Step 3: Cross multiply
    2,173.70x = 3,260.55 × 712.90
  4. Step 4: Simplify right side
    2,173.70x = 2,324,446.10
  5. Step 5: Solve for x
    x = 2,324,446.10/2,173.70
  6. Step 6: Final answer
    x = 1,069.35

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1.5x scale

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.