Home / 809,769.60-1,214,654.40-311,145.60

Finding the Fourth Proportional to 809,769.60, 1,214,654.40 and 311,145.60

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Solution

The fourth proportional to 809,769.60, 1,214,654.40 and 311,145.60 is: 466,718.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    809,769.60 : 1,214,654.40 = 311,145.60 : x
  2. Step 2: Convert to fraction form
    809,769.60/1,214,654.40 = 311,145.60/x
  3. Step 3: Cross multiply
    809,769.60x = 1,214,654.40 × 311,145.60
  4. Step 4: Simplify right side
    809,769.60x = 377,934,372,080.64
  5. Step 5: Solve for x
    x = 377,934,372,080.64/809,769.60
  6. Step 6: Final answer
    x = 466,718.40

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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.