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Finding the Fourth Proportional to 311,911.70, 467,211.45 and 259,423.70

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Solution

The fourth proportional to 311,911.70, 467,211.45 and 259,423.70 is: 388,589.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    311,911.70 : 467,211.45 = 259,423.70 : x
  2. Step 2: Convert to fraction form
    311,911.70/467,211.45 = 259,423.70/x
  3. Step 3: Cross multiply
    311,911.70x = 467,211.45 × 259,423.70
  4. Step 4: Simplify right side
    311,911.70x = 121,205,723,041.37
  5. Step 5: Solve for x
    x = 121,205,723,041.37/311,911.70
  6. Step 6: Final answer
    x = 388,589.86

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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.