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Finding the Fourth Proportional to 260,049.30, 389,782.35 and 133,640.70

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Solution

The fourth proportional to 260,049.30, 389,782.35 and 133,640.70 is: 200,311.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,049.30 : 389,782.35 = 133,640.70 : x
  2. Step 2: Convert to fraction form
    260,049.30/389,782.35 = 133,640.70/x
  3. Step 3: Cross multiply
    260,049.30x = 389,782.35 × 133,640.70
  4. Step 4: Simplify right side
    260,049.30x = 52,090,786,101.65
  5. Step 5: Solve for x
    x = 52,090,786,101.65/260,049.30
  6. Step 6: Final answer
    x = 200,311.20

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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.