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Finding the Fourth Proportional to 620,472.96, 856,345.20 and 378,895.56

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Solution

The fourth proportional to 620,472.96, 856,345.20 and 378,895.56 is: 522,932.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,472.96 : 856,345.20 = 378,895.56 : x
  2. Step 2: Convert to fraction form
    620,472.96/856,345.20 = 378,895.56/x
  3. Step 3: Cross multiply
    620,472.96x = 856,345.20 × 378,895.56
  4. Step 4: Simplify right side
    620,472.96x = 324,465,394,107.31
  5. Step 5: Solve for x
    x = 324,465,394,107.31/620,472.96
  6. Step 6: Final answer
    x = 522,932.37

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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.