Home / 809,936.80-1,214,905.20-389,111.20

Finding the Fourth Proportional to 809,936.80, 1,214,905.20 and 389,111.20

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Solution

The fourth proportional to 809,936.80, 1,214,905.20 and 389,111.20 is: 583,666.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,936.80 : 1,214,905.20 = 389,111.20 : x
  2. Step 2: Convert to fraction form
    809,936.80/1,214,905.20 = 389,111.20/x
  3. Step 3: Cross multiply
    809,936.80x = 1,214,905.20 × 389,111.20
  4. Step 4: Simplify right side
    809,936.80x = 472,733,220,258.24
  5. Step 5: Solve for x
    x = 472,733,220,258.24/809,936.80
  6. Step 6: Final answer
    x = 583,666.80

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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.