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Finding the Fourth Proportional to 259,329.70, 388,772.64 and 99,520.30

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Solution

The fourth proportional to 259,329.70, 388,772.64 and 99,520.30 is: 149,195.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,329.70 : 388,772.64 = 99,520.30 : x
  2. Step 2: Convert to fraction form
    259,329.70/388,772.64 = 99,520.30/x
  3. Step 3: Cross multiply
    259,329.70x = 388,772.64 × 99,520.30
  4. Step 4: Simplify right side
    259,329.70x = 38,690,769,764.59
  5. Step 5: Solve for x
    x = 38,690,769,764.59/259,329.70
  6. Step 6: Final answer
    x = 149,195.29

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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.