Home / 1,787.23-2,680.44-691.39

Finding the Fourth Proportional to 1,787.23, 2,680.44 and 691.39

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Solution

The fourth proportional to 1,787.23, 2,680.44 and 691.39 is: 1,036.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.23 : 2,680.44 = 691.39 : x
  2. Step 2: Convert to fraction form
    1,787.23/2,680.44 = 691.39/x
  3. Step 3: Cross multiply
    1,787.23x = 2,680.44 × 691.39
  4. Step 4: Simplify right side
    1,787.23x = 1,853,229.41
  5. Step 5: Solve for x
    x = 1,853,229.41/1,787.23
  6. Step 6: Final answer
    x = 1,036.93

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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.