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Finding the Fourth Proportional to 391,950.06, 587,983.51 and 139,209.31

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Solution

The fourth proportional to 391,950.06, 587,983.51 and 139,209.31 is: 208,834.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,950.06 : 587,983.51 = 139,209.31 : x
  2. Step 2: Convert to fraction form
    391,950.06/587,983.51 = 139,209.31/x
  3. Step 3: Cross multiply
    391,950.06x = 587,983.51 × 139,209.31
  4. Step 4: Simplify right side
    391,950.06x = 81,852,778,022.43
  5. Step 5: Solve for x
    x = 81,852,778,022.43/391,950.06
  6. Step 6: Final answer
    x = 208,834.71

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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.