Home / 810,769.59-1,215,204.45-330,697.78

Finding the Fourth Proportional to 810,769.59, 1,215,204.45 and 330,697.78

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Solution

The fourth proportional to 810,769.59, 1,215,204.45 and 330,697.78 is: 495,659.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,769.59 : 1,215,204.45 = 330,697.78 : x
  2. Step 2: Convert to fraction form
    810,769.59/1,215,204.45 = 330,697.78/x
  3. Step 3: Cross multiply
    810,769.59x = 1,215,204.45 × 330,697.78
  4. Step 4: Simplify right side
    810,769.59x = 401,865,413,861.12
  5. Step 5: Solve for x
    x = 401,865,413,861.12/810,769.59
  6. Step 6: Final answer
    x = 495,659.21

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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.