Home / 2,174.36-3,261.87-787.77

Finding the Fourth Proportional to 2,174.36, 3,261.87 and 787.77

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Solution

The fourth proportional to 2,174.36, 3,261.87 and 787.77 is: 1,181.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.36 : 3,261.87 = 787.77 : x
  2. Step 2: Convert to fraction form
    2,174.36/3,261.87 = 787.77/x
  3. Step 3: Cross multiply
    2,174.36x = 3,261.87 × 787.77
  4. Step 4: Simplify right side
    2,174.36x = 2,569,603.33
  5. Step 5: Solve for x
    x = 2,569,603.33/2,174.36
  6. Step 6: Final answer
    x = 1,181.78

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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.