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Finding the Fourth Proportional to 361,903.80, 541,818.90 and 320,431.80

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Solution

The fourth proportional to 361,903.80, 541,818.90 and 320,431.80 is: 479,729.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    361,903.80 : 541,818.90 = 320,431.80 : x
  2. Step 2: Convert to fraction form
    361,903.80/541,818.90 = 320,431.80/x
  3. Step 3: Cross multiply
    361,903.80x = 541,818.90 × 320,431.80
  4. Step 4: Simplify right side
    361,903.80x = 173,616,005,401.02
  5. Step 5: Solve for x
    x = 173,616,005,401.02/361,903.80
  6. Step 6: Final answer
    x = 479,729.71

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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.