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Finding the Fourth Proportional to 259,454.80, 388,890.60 and 133,046.20

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Solution

The fourth proportional to 259,454.80, 388,890.60 and 133,046.20 is: 199,419.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,454.80 : 388,890.60 = 133,046.20 : x
  2. Step 2: Convert to fraction form
    259,454.80/388,890.60 = 133,046.20/x
  3. Step 3: Cross multiply
    259,454.80x = 388,890.60 × 133,046.20
  4. Step 4: Simplify right side
    259,454.80x = 51,740,416,545.72
  5. Step 5: Solve for x
    x = 51,740,416,545.72/259,454.80
  6. Step 6: Final answer
    x = 199,419.77

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1.5x scale

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.