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Finding the Fourth Proportional to 3,861.73, 5,787.94 and 1,778.88

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Solution

The fourth proportional to 3,861.73, 5,787.94 and 1,778.88 is: 2,666.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,861.73 : 5,787.94 = 1,778.88 : x
  2. Step 2: Convert to fraction form
    3,861.73/5,787.94 = 1,778.88/x
  3. Step 3: Cross multiply
    3,861.73x = 5,787.94 × 1,778.88
  4. Step 4: Simplify right side
    3,861.73x = 10,296,050.71
  5. Step 5: Solve for x
    x = 10,296,050.71/3,861.73
  6. Step 6: Final answer
    x = 2,666.18

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1.5x scale

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.