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Finding the Fourth Proportional to 276,660.80, 381,786.88 and 155,801.60

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Solution

The fourth proportional to 276,660.80, 381,786.88 and 155,801.60 is: 215,003.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,660.80 : 381,786.88 = 155,801.60 : x
  2. Step 2: Convert to fraction form
    276,660.80/381,786.88 = 155,801.60/x
  3. Step 3: Cross multiply
    276,660.80x = 381,786.88 × 155,801.60
  4. Step 4: Simplify right side
    276,660.80x = 59,483,006,763.01
  5. Step 5: Solve for x
    x = 59,483,006,763.01/276,660.80
  6. Step 6: Final answer
    x = 215,003.38

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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.