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Finding the Fourth Proportional to 491,453.93, 678,133.28 and 276,581.18

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Solution

The fourth proportional to 491,453.93, 678,133.28 and 276,581.18 is: 381,640.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,453.93 : 678,133.28 = 276,581.18 : x
  2. Step 2: Convert to fraction form
    491,453.93/678,133.28 = 276,581.18/x
  3. Step 3: Cross multiply
    491,453.93x = 678,133.28 × 276,581.18
  4. Step 4: Simplify right side
    491,453.93x = 187,558,901,396.77
  5. Step 5: Solve for x
    x = 187,558,901,396.77/491,453.93
  6. Step 6: Final answer
    x = 381,640.86

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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.