Home / 2,171.20-3,255.60-709.60

Finding the Fourth Proportional to 2,171.20, 3,255.60 and 709.60

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Solution

The fourth proportional to 2,171.20, 3,255.60 and 709.60 is: 1,064.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,171.20 : 3,255.60 = 709.60 : x
  2. Step 2: Convert to fraction form
    2,171.20/3,255.60 = 709.60/x
  3. Step 3: Cross multiply
    2,171.20x = 3,255.60 × 709.60
  4. Step 4: Simplify right side
    2,171.20x = 2,310,173.76
  5. Step 5: Solve for x
    x = 2,310,173.76/2,171.20
  6. Step 6: Final answer
    x = 1,064.01

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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.