Home / 685,861.80-1,028,792.70-311,884.80

Finding the Fourth Proportional to 685,861.80, 1,028,792.70 and 311,884.80

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Solution

The fourth proportional to 685,861.80, 1,028,792.70 and 311,884.80 is: 467,827.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,861.80 : 1,028,792.70 = 311,884.80 : x
  2. Step 2: Convert to fraction form
    685,861.80/1,028,792.70 = 311,884.80/x
  3. Step 3: Cross multiply
    685,861.80x = 1,028,792.70 × 311,884.80
  4. Step 4: Simplify right side
    685,861.80x = 320,864,805,480.96
  5. Step 5: Solve for x
    x = 320,864,805,480.96/685,861.80
  6. Step 6: Final answer
    x = 467,827.20

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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.