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Finding the Fourth Proportional to 391,881.96, 587,331.09 and 211,960.17

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Solution

The fourth proportional to 391,881.96, 587,331.09 and 211,960.17 is: 317,674.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,881.96 : 587,331.09 = 211,960.17 : x
  2. Step 2: Convert to fraction form
    391,881.96/587,331.09 = 211,960.17/x
  3. Step 3: Cross multiply
    391,881.96x = 587,331.09 × 211,960.17
  4. Step 4: Simplify right side
    391,881.96x = 124,490,797,682.69
  5. Step 5: Solve for x
    x = 124,490,797,682.69/391,881.96
  6. Step 6: Final answer
    x = 317,674.22

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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.