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Finding the Fourth Proportional to 391,104.91, 586,825.94 and 211,154.60

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Solution

The fourth proportional to 391,104.91, 586,825.94 and 211,154.60 is: 316,822.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,104.91 : 586,825.94 = 211,154.60 : x
  2. Step 2: Convert to fraction form
    391,104.91/586,825.94 = 211,154.60/x
  3. Step 3: Cross multiply
    391,104.91x = 586,825.94 × 211,154.60
  4. Step 4: Simplify right side
    391,104.91x = 123,910,998,625.28
  5. Step 5: Solve for x
    x = 123,910,998,625.28/391,104.91
  6. Step 6: Final answer
    x = 316,822.92

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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.