Home / 809,643.60-1,214,465.40-311,019.60

Finding the Fourth Proportional to 809,643.60, 1,214,465.40 and 311,019.60

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Solution

The fourth proportional to 809,643.60, 1,214,465.40 and 311,019.60 is: 466,529.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,643.60 : 1,214,465.40 = 311,019.60 : x
  2. Step 2: Convert to fraction form
    809,643.60/1,214,465.40 = 311,019.60/x
  3. Step 3: Cross multiply
    809,643.60x = 1,214,465.40 × 311,019.60
  4. Step 4: Simplify right side
    809,643.60x = 377,722,542,921.84
  5. Step 5: Solve for x
    x = 377,722,542,921.84/809,643.60
  6. Step 6: Final answer
    x = 466,529.40

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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.