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Finding the Fourth Proportional to 1,787.73, 2,681.26 and 747.45

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Solution

The fourth proportional to 1,787.73, 2,681.26 and 747.45 is: 1,121.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.73 : 2,681.26 = 747.45 : x
  2. Step 2: Convert to fraction form
    1,787.73/2,681.26 = 747.45/x
  3. Step 3: Cross multiply
    1,787.73x = 2,681.26 × 747.45
  4. Step 4: Simplify right side
    1,787.73x = 2,004,107.79
  5. Step 5: Solve for x
    x = 2,004,107.79/1,787.73
  6. Step 6: Final answer
    x = 1,121.04

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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.