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Finding the Fourth Proportional to 386,235.88, 579,243.09 and 116,390.15

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Solution

The fourth proportional to 386,235.88, 579,243.09 and 116,390.15 is: 174,551.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,235.88 : 579,243.09 = 116,390.15 : x
  2. Step 2: Convert to fraction form
    386,235.88/579,243.09 = 116,390.15/x
  3. Step 3: Cross multiply
    386,235.88x = 579,243.09 × 116,390.15
  4. Step 4: Simplify right side
    386,235.88x = 67,418,187,235.35
  5. Step 5: Solve for x
    x = 67,418,187,235.35/386,235.88
  6. Step 6: Final answer
    x = 174,551.85

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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.