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Finding the Fourth Proportional to 391,062.80, 587,576.87 and 248,971.51

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Solution

The fourth proportional to 391,062.80, 587,576.87 and 248,971.51 is: 374,082.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,062.80 : 587,576.87 = 248,971.51 : x
  2. Step 2: Convert to fraction form
    391,062.80/587,576.87 = 248,971.51/x
  3. Step 3: Cross multiply
    391,062.80x = 587,576.87 × 248,971.51
  4. Step 4: Simplify right side
    391,062.80x = 146,289,900,564.97
  5. Step 5: Solve for x
    x = 146,289,900,564.97/391,062.80
  6. Step 6: Final answer
    x = 374,082.89

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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.