Home / 1,787.40-2,682.83-1,688.78

Finding the Fourth Proportional to 1,787.40, 2,682.83 and 1,688.78

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Solution

The fourth proportional to 1,787.40, 2,682.83 and 1,688.78 is: 2,534.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.40 : 2,682.83 = 1,688.78 : x
  2. Step 2: Convert to fraction form
    1,787.40/2,682.83 = 1,688.78/x
  3. Step 3: Cross multiply
    1,787.40x = 2,682.83 × 1,688.78
  4. Step 4: Simplify right side
    1,787.40x = 4,530,720.58
  5. Step 5: Solve for x
    x = 4,530,720.58/1,787.40
  6. Step 6: Final answer
    x = 2,534.81

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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.