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Finding the Fourth Proportional to 381,276.84, 571,919.10 and 115,039.56

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Solution

The fourth proportional to 381,276.84, 571,919.10 and 115,039.56 is: 172,560.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,276.84 : 571,919.10 = 115,039.56 : x
  2. Step 2: Convert to fraction form
    381,276.84/571,919.10 = 115,039.56/x
  3. Step 3: Cross multiply
    381,276.84x = 571,919.10 × 115,039.56
  4. Step 4: Simplify right side
    381,276.84x = 65,793,321,619.60
  5. Step 5: Solve for x
    x = 65,793,321,619.60/381,276.84
  6. Step 6: Final answer
    x = 172,560.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.