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Finding the Fourth Proportional to 461,128.61, 636,249.13 and 279,836.44

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Solution

The fourth proportional to 461,128.61, 636,249.13 and 279,836.44 is: 386,108.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    461,128.61 : 636,249.13 = 279,836.44 : x
  2. Step 2: Convert to fraction form
    461,128.61/636,249.13 = 279,836.44/x
  3. Step 3: Cross multiply
    461,128.61x = 636,249.13 × 279,836.44
  4. Step 4: Simplify right side
    461,128.61x = 178,045,689,202.08
  5. Step 5: Solve for x
    x = 178,045,689,202.08/461,128.61
  6. Step 6: Final answer
    x = 386,108.53

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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.