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Finding the Fourth Proportional to 320,793.90, 481,190.85 and 318,950.70

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Solution

The fourth proportional to 320,793.90, 481,190.85 and 318,950.70 is: 478,426.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    320,793.90 : 481,190.85 = 318,950.70 : x
  2. Step 2: Convert to fraction form
    320,793.90/481,190.85 = 318,950.70/x
  3. Step 3: Cross multiply
    320,793.90x = 481,190.85 × 318,950.70
  4. Step 4: Simplify right side
    320,793.90x = 153,476,158,441.10
  5. Step 5: Solve for x
    x = 153,476,158,441.10/320,793.90
  6. Step 6: Final answer
    x = 478,426.05

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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.