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Finding the Fourth Proportional to 259,585.07, 389,375.85 and 139,698.44

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Solution

The fourth proportional to 259,585.07, 389,375.85 and 139,698.44 is: 209,546.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,585.07 : 389,375.85 = 139,698.44 : x
  2. Step 2: Convert to fraction form
    259,585.07/389,375.85 = 139,698.44/x
  3. Step 3: Cross multiply
    259,585.07x = 389,375.85 × 139,698.44
  4. Step 4: Simplify right side
    259,585.07x = 54,395,196,871.79
  5. Step 5: Solve for x
    x = 54,395,196,871.79/259,585.07
  6. Step 6: Final answer
    x = 209,546.71

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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.