Home / 828,981.80-1,243,472.70-408,170.60

Finding the Fourth Proportional to 828,981.80, 1,243,472.70 and 408,170.60

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Solution

The fourth proportional to 828,981.80, 1,243,472.70 and 408,170.60 is: 612,255.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    828,981.80 : 1,243,472.70 = 408,170.60 : x
  2. Step 2: Convert to fraction form
    828,981.80/1,243,472.70 = 408,170.60/x
  3. Step 3: Cross multiply
    828,981.80x = 1,243,472.70 × 408,170.60
  4. Step 4: Simplify right side
    828,981.80x = 507,548,998,042.62
  5. Step 5: Solve for x
    x = 507,548,998,042.62/828,981.80
  6. Step 6: Final answer
    x = 612,255.90

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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.