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Finding the Fourth Proportional to 491,377.11, 678,098.28 and 276,520.83

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Solution

The fourth proportional to 491,377.11, 678,098.28 and 276,520.83 is: 381,597.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,377.11 : 678,098.28 = 276,520.83 : x
  2. Step 2: Convert to fraction form
    491,377.11/678,098.28 = 276,520.83/x
  3. Step 3: Cross multiply
    491,377.11x = 678,098.28 × 276,520.83
  4. Step 4: Simplify right side
    491,377.11x = 187,508,299,207.17
  5. Step 5: Solve for x
    x = 187,508,299,207.17/491,377.11
  6. Step 6: Final answer
    x = 381,597.55

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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.