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Finding the Fourth Proportional to 545,998,438.80, 818,997,658.20 and 218,524,494.60

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Solution

The fourth proportional to 545,998,438.80, 818,997,658.20 and 218,524,494.60 is: 327,786,741.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    545,998,438.80 : 818,997,658.20 = 218,524,494.60 : x
  2. Step 2: Convert to fraction form
    545,998,438.80/818,997,658.20 = 218,524,494.60/x
  3. Step 3: Cross multiply
    545,998,438.80x = 818,997,658.20 × 218,524,494.60
  4. Step 4: Simplify right side
    545,998,438.80x = 178,971,049,336,738,560
  5. Step 5: Solve for x
    x = 178,971,049,336,738,560/545,998,438.80
  6. Step 6: Final answer
    x = 327,786,741.90

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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.