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Finding the Fourth Proportional to 313,999.80, 470,999.70 and 311,047.35

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Solution

The fourth proportional to 313,999.80, 470,999.70 and 311,047.35 is: 466,571.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,999.80 : 470,999.70 = 311,047.35 : x
  2. Step 2: Convert to fraction form
    313,999.80/470,999.70 = 311,047.35/x
  3. Step 3: Cross multiply
    313,999.80x = 470,999.70 × 311,047.35
  4. Step 4: Simplify right side
    313,999.80x = 146,503,208,535.80
  5. Step 5: Solve for x
    x = 146,503,208,535.80/313,999.80
  6. Step 6: Final answer
    x = 466,571.03

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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.