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Finding the Fourth Proportional to 276,234.49, 381,205.61 and 155,374.80

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Solution

The fourth proportional to 276,234.49, 381,205.61 and 155,374.80 is: 214,418.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,234.49 : 381,205.61 = 155,374.80 : x
  2. Step 2: Convert to fraction form
    276,234.49/381,205.61 = 155,374.80/x
  3. Step 3: Cross multiply
    276,234.49x = 381,205.61 × 155,374.80
  4. Step 4: Simplify right side
    276,234.49x = 59,229,745,412.63
  5. Step 5: Solve for x
    x = 59,229,745,412.63/276,234.49
  6. Step 6: Final answer
    x = 214,418.36

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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.