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Finding the Fourth Proportional to 263,906.40, 395,859.60 and 243,631.20

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Solution

The fourth proportional to 263,906.40, 395,859.60 and 243,631.20 is: 365,446.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,906.40 : 395,859.60 = 243,631.20 : x
  2. Step 2: Convert to fraction form
    263,906.40/395,859.60 = 243,631.20/x
  3. Step 3: Cross multiply
    263,906.40x = 395,859.60 × 243,631.20
  4. Step 4: Simplify right side
    263,906.40x = 96,443,749,379.52
  5. Step 5: Solve for x
    x = 96,443,749,379.52/263,906.40
  6. Step 6: Final answer
    x = 365,446.80

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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.