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Finding the Fourth Proportional to 259,741.20, 389,611.80 and 218,406.90

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Solution

The fourth proportional to 259,741.20, 389,611.80 and 218,406.90 is: 327,610.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,741.20 : 389,611.80 = 218,406.90 : x
  2. Step 2: Convert to fraction form
    259,741.20/389,611.80 = 218,406.90/x
  3. Step 3: Cross multiply
    259,741.20x = 389,611.80 × 218,406.90
  4. Step 4: Simplify right side
    259,741.20x = 85,093,905,441.42
  5. Step 5: Solve for x
    x = 85,093,905,441.42/259,741.20
  6. Step 6: Final answer
    x = 327,610.35

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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.