Home / 809,246.10-1,213,869.15-388,305.30

Finding the Fourth Proportional to 809,246.10, 1,213,869.15 and 388,305.30

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Solution

The fourth proportional to 809,246.10, 1,213,869.15 and 388,305.30 is: 582,457.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,246.10 : 1,213,869.15 = 388,305.30 : x
  2. Step 2: Convert to fraction form
    809,246.10/1,213,869.15 = 388,305.30/x
  3. Step 3: Cross multiply
    809,246.10x = 1,213,869.15 × 388,305.30
  4. Step 4: Simplify right side
    809,246.10x = 471,351,824,451.50
  5. Step 5: Solve for x
    x = 471,351,824,451.50/809,246.10
  6. Step 6: Final answer
    x = 582,457.95

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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.