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Finding the Fourth Proportional to 1,787.00, 2,678.65 and 747.61

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Solution

The fourth proportional to 1,787.00, 2,678.65 and 747.61 is: 1,120.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,787.00 : 2,678.65 = 747.61 : x
  2. Step 2: Convert to fraction form
    1,787.00/2,678.65 = 747.61/x
  3. Step 3: Cross multiply
    1,787.00x = 2,678.65 × 747.61
  4. Step 4: Simplify right side
    1,787.00x = 2,002,576.96
  5. Step 5: Solve for x
    x = 2,002,576.96/1,787.00
  6. Step 6: Final answer
    x = 1,120.64

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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.