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Finding the Fourth Proportional to 491,869.05, 678,761.37 and 274,066.47

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Solution

The fourth proportional to 491,869.05, 678,761.37 and 274,066.47 is: 378,201.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,869.05 : 678,761.37 = 274,066.47 : x
  2. Step 2: Convert to fraction form
    491,869.05/678,761.37 = 274,066.47/x
  3. Step 3: Cross multiply
    491,869.05x = 678,761.37 × 274,066.47
  4. Step 4: Simplify right side
    491,869.05x = 186,025,732,648.26
  5. Step 5: Solve for x
    x = 186,025,732,648.26/491,869.05
  6. Step 6: Final answer
    x = 378,201.74

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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.