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Finding the Fourth Proportional to 378,624.45, 567,860.28 and 138,656.43

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Solution

The fourth proportional to 378,624.45, 567,860.28 and 138,656.43 is: 207,956.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,624.45 : 567,860.28 = 138,656.43 : x
  2. Step 2: Convert to fraction form
    378,624.45/567,860.28 = 138,656.43/x
  3. Step 3: Cross multiply
    378,624.45x = 567,860.28 × 138,656.43
  4. Step 4: Simplify right side
    378,624.45x = 78,737,479,163.60
  5. Step 5: Solve for x
    x = 78,737,479,163.60/378,624.45
  6. Step 6: Final answer
    x = 207,956.67

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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.