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Finding the Fourth Proportional to 276,290.96, 381,273 and 155,438.96

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Solution

The fourth proportional to 276,290.96, 381,273 and 155,438.96 is: 214,500.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,290.96 : 381,273 = 155,438.96 : x
  2. Step 2: Convert to fraction form
    276,290.96/381,273 = 155,438.96/x
  3. Step 3: Cross multiply
    276,290.96x = 381,273 × 155,438.96
  4. Step 4: Simplify right side
    276,290.96x = 59,264,678,596.08
  5. Step 5: Solve for x
    x = 59,264,678,596.08/276,290.96
  6. Step 6: Final answer
    x = 214,500.97

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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.