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Finding the Fourth Proportional to 620,239.96, 856,023.68 and 378,662.56

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Solution

The fourth proportional to 620,239.96, 856,023.68 and 378,662.56 is: 522,610.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,239.96 : 856,023.68 = 378,662.56 : x
  2. Step 2: Convert to fraction form
    620,239.96/856,023.68 = 378,662.56/x
  3. Step 3: Cross multiply
    620,239.96x = 856,023.68 × 378,662.56
  4. Step 4: Simplify right side
    620,239.96x = 324,144,118,089.42
  5. Step 5: Solve for x
    x = 324,144,118,089.42/620,239.96
  6. Step 6: Final answer
    x = 522,610.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.