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Finding the Fourth Proportional to 276,310.86, 381,282 and 155,449.62

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Solution

The fourth proportional to 276,310.86, 381,282 and 155,449.62 is: 214,505.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,310.86 : 381,282 = 155,449.62 : x
  2. Step 2: Convert to fraction form
    276,310.86/381,282 = 155,449.62/x
  3. Step 3: Cross multiply
    276,310.86x = 381,282 × 155,449.62
  4. Step 4: Simplify right side
    276,310.86x = 59,270,142,012.84
  5. Step 5: Solve for x
    x = 59,270,142,012.84/276,310.86
  6. Step 6: Final answer
    x = 214,505.29

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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.