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Finding the Fourth Proportional to 313,919.80, 470,879.70 and 251,711.80

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Solution

The fourth proportional to 313,919.80, 470,879.70 and 251,711.80 is: 377,567.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,919.80 : 470,879.70 = 251,711.80 : x
  2. Step 2: Convert to fraction form
    313,919.80/470,879.70 = 251,711.80/x
  3. Step 3: Cross multiply
    313,919.80x = 470,879.70 × 251,711.80
  4. Step 4: Simplify right side
    313,919.80x = 118,525,976,870.46
  5. Step 5: Solve for x
    x = 118,525,976,870.46/313,919.80
  6. Step 6: Final answer
    x = 377,567.70

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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.