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Finding the Fourth Proportional to 276,377.22, 381,423 and 155,511.45

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Solution

The fourth proportional to 276,377.22, 381,423 and 155,511.45 is: 214,618.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,377.22 : 381,423 = 155,511.45 : x
  2. Step 2: Convert to fraction form
    276,377.22/381,423 = 155,511.45/x
  3. Step 3: Cross multiply
    276,377.22x = 381,423 × 155,511.45
  4. Step 4: Simplify right side
    276,377.22x = 59,315,643,793.35
  5. Step 5: Solve for x
    x = 59,315,643,793.35/276,377.22
  6. Step 6: Final answer
    x = 214,618.43

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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.