Home / 1,321,128.20-1,981,692.30-323,856.20

Finding the Fourth Proportional to 1,321,128.20, 1,981,692.30 and 323,856.20

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Solution

The fourth proportional to 1,321,128.20, 1,981,692.30 and 323,856.20 is: 485,784.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,321,128.20 : 1,981,692.30 = 323,856.20 : x
  2. Step 2: Convert to fraction form
    1,321,128.20/1,981,692.30 = 323,856.20/x
  3. Step 3: Cross multiply
    1,321,128.20x = 1,981,692.30 × 323,856.20
  4. Step 4: Simplify right side
    1,321,128.20x = 641,783,337,847.26
  5. Step 5: Solve for x
    x = 641,783,337,847.26/1,321,128.20
  6. Step 6: Final answer
    x = 485,784.30

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Double scale
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Similar ratio
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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.