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Finding the Fourth Proportional to 2,170.40, 3,255.59 and 709.55

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Solution

The fourth proportional to 2,170.40, 3,255.59 and 709.55 is: 1,064.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,170.40 : 3,255.59 = 709.55 : x
  2. Step 2: Convert to fraction form
    2,170.40/3,255.59 = 709.55/x
  3. Step 3: Cross multiply
    2,170.40x = 3,255.59 × 709.55
  4. Step 4: Simplify right side
    2,170.40x = 2,310,003.88
  5. Step 5: Solve for x
    x = 2,310,003.88/2,170.40
  6. Step 6: Final answer
    x = 1,064.32

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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.