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Finding the Fourth Proportional to 276,775.57, 381,986.85 and 155,940.72

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Solution

The fourth proportional to 276,775.57, 381,986.85 and 155,940.72 is: 215,218.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,775.57 : 381,986.85 = 155,940.72 : x
  2. Step 2: Convert to fraction form
    276,775.57/381,986.85 = 155,940.72/x
  3. Step 3: Cross multiply
    276,775.57x = 381,986.85 × 155,940.72
  4. Step 4: Simplify right side
    276,775.57x = 59,567,304,419.53
  5. Step 5: Solve for x
    x = 59,567,304,419.53/276,775.57
  6. Step 6: Final answer
    x = 215,218.79

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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.