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Finding the Fourth Proportional to 259,284.38, 388,992.17 and 72,295.88

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Solution

The fourth proportional to 259,284.38, 388,992.17 and 72,295.88 is: 108,462.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,284.38 : 388,992.17 = 72,295.88 : x
  2. Step 2: Convert to fraction form
    259,284.38/388,992.17 = 72,295.88/x
  3. Step 3: Cross multiply
    259,284.38x = 388,992.17 × 72,295.88
  4. Step 4: Simplify right side
    259,284.38x = 28,122,529,479.04
  5. Step 5: Solve for x
    x = 28,122,529,479.04/259,284.38
  6. Step 6: Final answer
    x = 108,462.11

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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.