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Finding the Fourth Proportional to 391,491.40, 587,237.10 and 204,867.40

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Solution

The fourth proportional to 391,491.40, 587,237.10 and 204,867.40 is: 307,301.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,491.40 : 587,237.10 = 204,867.40 : x
  2. Step 2: Convert to fraction form
    391,491.40/587,237.10 = 204,867.40/x
  3. Step 3: Cross multiply
    391,491.40x = 587,237.10 × 204,867.40
  4. Step 4: Simplify right side
    391,491.40x = 120,305,737,860.54
  5. Step 5: Solve for x
    x = 120,305,737,860.54/391,491.40
  6. Step 6: Final answer
    x = 307,301.10

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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.