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Finding the Fourth Proportional to 391,950.56, 587,984.26 and 139,209.81

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Solution

The fourth proportional to 391,950.56, 587,984.26 and 139,209.81 is: 208,835.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,950.56 : 587,984.26 = 139,209.81 : x
  2. Step 2: Convert to fraction form
    391,950.56/587,984.26 = 139,209.81/x
  3. Step 3: Cross multiply
    391,950.56x = 587,984.26 × 139,209.81
  4. Step 4: Simplify right side
    391,950.56x = 81,853,176,769.57
  5. Step 5: Solve for x
    x = 81,853,176,769.57/391,950.56
  6. Step 6: Final answer
    x = 208,835.47

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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.