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Finding the Fourth Proportional to 259,348.50, 389,022.75 and 72,360

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Solution

The fourth proportional to 259,348.50, 389,022.75 and 72,360 is: 108,540

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,348.50 : 389,022.75 = 72,360 : x
  2. Step 2: Convert to fraction form
    259,348.50/389,022.75 = 72,360/x
  3. Step 3: Cross multiply
    259,348.50x = 389,022.75 × 72,360
  4. Step 4: Simplify right side
    259,348.50x = 28,149,686,190
  5. Step 5: Solve for x
    x = 28,149,686,190/259,348.50
  6. Step 6: Final answer
    x = 108,540

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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.