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Finding the Fourth Proportional to 2,505.62, 3,758.84 and 861.77

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Solution

The fourth proportional to 2,505.62, 3,758.84 and 861.77 is: 1,292.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,505.62 : 3,758.84 = 861.77 : x
  2. Step 2: Convert to fraction form
    2,505.62/3,758.84 = 861.77/x
  3. Step 3: Cross multiply
    2,505.62x = 3,758.84 × 861.77
  4. Step 4: Simplify right side
    2,505.62x = 3,239,232.44
  5. Step 5: Solve for x
    x = 3,239,232.44/2,505.62
  6. Step 6: Final answer
    x = 1,292.79

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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.