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Finding the Fourth Proportional to 548,906.60, 823,359.90 and 389,474.30

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Solution

The fourth proportional to 548,906.60, 823,359.90 and 389,474.30 is: 584,211.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,906.60 : 823,359.90 = 389,474.30 : x
  2. Step 2: Convert to fraction form
    548,906.60/823,359.90 = 389,474.30/x
  3. Step 3: Cross multiply
    548,906.60x = 823,359.90 × 389,474.30
  4. Step 4: Simplify right side
    548,906.60x = 320,677,520,700.57
  5. Step 5: Solve for x
    x = 320,677,520,700.57/548,906.60
  6. Step 6: Final answer
    x = 584,211.45

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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.