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Finding the Fourth Proportional to 259,289.44, 388,999.77 and 72,300.94

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Solution

The fourth proportional to 259,289.44, 388,999.77 and 72,300.94 is: 108,469.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,289.44 : 388,999.77 = 72,300.94 : x
  2. Step 2: Convert to fraction form
    259,289.44/388,999.77 = 72,300.94/x
  3. Step 3: Cross multiply
    259,289.44x = 388,999.77 × 72,300.94
  4. Step 4: Simplify right side
    259,289.44x = 28,125,047,787.16
  5. Step 5: Solve for x
    x = 28,125,047,787.16/259,289.44
  6. Step 6: Final answer
    x = 108,469.70

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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.