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Finding the Fourth Proportional to 318,958.20, 477,999.90 and 259,909.20

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Solution

The fourth proportional to 318,958.20, 477,999.90 and 259,909.20 is: 389,507.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,958.20 : 477,999.90 = 259,909.20 : x
  2. Step 2: Convert to fraction form
    318,958.20/477,999.90 = 259,909.20/x
  3. Step 3: Cross multiply
    318,958.20x = 477,999.90 × 259,909.20
  4. Step 4: Simplify right side
    318,958.20x = 124,236,571,609.08
  5. Step 5: Solve for x
    x = 124,236,571,609.08/318,958.20
  6. Step 6: Final answer
    x = 389,507.38

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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.