Home / 809,344.10-1,214,016.15-388,403.30

Finding the Fourth Proportional to 809,344.10, 1,214,016.15 and 388,403.30

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Solution

The fourth proportional to 809,344.10, 1,214,016.15 and 388,403.30 is: 582,604.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,344.10 : 1,214,016.15 = 388,403.30 : x
  2. Step 2: Convert to fraction form
    809,344.10/1,214,016.15 = 388,403.30/x
  3. Step 3: Cross multiply
    809,344.10x = 1,214,016.15 × 388,403.30
  4. Step 4: Simplify right side
    809,344.10x = 471,527,878,913.30
  5. Step 5: Solve for x
    x = 471,527,878,913.30/809,344.10
  6. Step 6: Final answer
    x = 582,604.95

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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.