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Finding the Fourth Proportional to 313,879.20, 470,818.80 and 279,472.80

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Solution

The fourth proportional to 313,879.20, 470,818.80 and 279,472.80 is: 419,209.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,879.20 : 470,818.80 = 279,472.80 : x
  2. Step 2: Convert to fraction form
    313,879.20/470,818.80 = 279,472.80/x
  3. Step 3: Cross multiply
    313,879.20x = 470,818.80 × 279,472.80
  4. Step 4: Simplify right side
    313,879.20x = 131,581,048,328.64
  5. Step 5: Solve for x
    x = 131,581,048,328.64/313,879.20
  6. Step 6: Final answer
    x = 419,209.20

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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.