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Finding the Fourth Proportional to 259,056.75, 388,640.70 and 146,790.75

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Solution

The fourth proportional to 259,056.75, 388,640.70 and 146,790.75 is: 220,217.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,056.75 : 388,640.70 = 146,790.75 : x
  2. Step 2: Convert to fraction form
    259,056.75/388,640.70 = 146,790.75/x
  3. Step 3: Cross multiply
    259,056.75x = 388,640.70 × 146,790.75
  4. Step 4: Simplify right side
    259,056.75x = 57,048,859,833.53
  5. Step 5: Solve for x
    x = 57,048,859,833.53/259,056.75
  6. Step 6: Final answer
    x = 220,217.62

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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.