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Finding the Fourth Proportional to 5,787.77, 7,990.55 and 3,801.80

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Solution

The fourth proportional to 5,787.77, 7,990.55 and 3,801.80 is: 5,248.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,787.77 : 7,990.55 = 3,801.80 : x
  2. Step 2: Convert to fraction form
    5,787.77/7,990.55 = 3,801.80/x
  3. Step 3: Cross multiply
    5,787.77x = 7,990.55 × 3,801.80
  4. Step 4: Simplify right side
    5,787.77x = 30,378,414.03
  5. Step 5: Solve for x
    x = 30,378,414.03/5,787.77
  6. Step 6: Final answer
    x = 5,248.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.