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Finding the Fourth Proportional to 456,739.30, 685,108.95 and 220,105.90

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Solution

The fourth proportional to 456,739.30, 685,108.95 and 220,105.90 is: 330,158.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,739.30 : 685,108.95 = 220,105.90 : x
  2. Step 2: Convert to fraction form
    456,739.30/685,108.95 = 220,105.90/x
  3. Step 3: Cross multiply
    456,739.30x = 685,108.95 × 220,105.90
  4. Step 4: Simplify right side
    456,739.30x = 150,796,522,037.81
  5. Step 5: Solve for x
    x = 150,796,522,037.81/456,739.30
  6. Step 6: Final answer
    x = 330,158.85

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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.