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Finding the Fourth Proportional to 391,242.89, 587,082.39 and 211,324.69

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Solution

The fourth proportional to 391,242.89, 587,082.39 and 211,324.69 is: 317,104.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,242.89 : 587,082.39 = 211,324.69 : x
  2. Step 2: Convert to fraction form
    391,242.89/587,082.39 = 211,324.69/x
  3. Step 3: Cross multiply
    391,242.89x = 587,082.39 × 211,324.69
  4. Step 4: Simplify right side
    391,242.89x = 124,065,003,395.97
  5. Step 5: Solve for x
    x = 124,065,003,395.97/391,242.89
  6. Step 6: Final answer
    x = 317,104.81

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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.