Home / 2,231.20-3,345.90-769.60

Finding the Fourth Proportional to 2,231.20, 3,345.90 and 769.60

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Solution

The fourth proportional to 2,231.20, 3,345.90 and 769.60 is: 1,154.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,231.20 : 3,345.90 = 769.60 : x
  2. Step 2: Convert to fraction form
    2,231.20/3,345.90 = 769.60/x
  3. Step 3: Cross multiply
    2,231.20x = 3,345.90 × 769.60
  4. Step 4: Simplify right side
    2,231.20x = 2,575,004.64
  5. Step 5: Solve for x
    x = 2,575,004.64/2,231.20
  6. Step 6: Final answer
    x = 1,154.09

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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.