Home / 2,174.75-3,261.30-787.70

Finding the Fourth Proportional to 2,174.75, 3,261.30 and 787.70

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Solution

The fourth proportional to 2,174.75, 3,261.30 and 787.70 is: 1,181.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.75 : 3,261.30 = 787.70 : x
  2. Step 2: Convert to fraction form
    2,174.75/3,261.30 = 787.70/x
  3. Step 3: Cross multiply
    2,174.75x = 3,261.30 × 787.70
  4. Step 4: Simplify right side
    2,174.75x = 2,568,926.01
  5. Step 5: Solve for x
    x = 2,568,926.01/2,174.75
  6. Step 6: Final answer
    x = 1,181.25

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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.