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Finding the Fourth Proportional to 1,787.15, 2,679.89 and 676.77

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Solution

The fourth proportional to 1,787.15, 2,679.89 and 676.77 is: 1,014.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.15 : 2,679.89 = 676.77 : x
  2. Step 2: Convert to fraction form
    1,787.15/2,679.89 = 676.77/x
  3. Step 3: Cross multiply
    1,787.15x = 2,679.89 × 676.77
  4. Step 4: Simplify right side
    1,787.15x = 1,813,677.52
  5. Step 5: Solve for x
    x = 1,813,677.52/1,787.15
  6. Step 6: Final answer
    x = 1,014.85

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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.