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Finding the Fourth Proportional to 620,660.72, 856,609.08 and 366,039.92

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Solution

The fourth proportional to 620,660.72, 856,609.08 and 366,039.92 is: 505,192.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,660.72 : 856,609.08 = 366,039.92 : x
  2. Step 2: Convert to fraction form
    620,660.72/856,609.08 = 366,039.92/x
  3. Step 3: Cross multiply
    620,660.72x = 856,609.08 × 366,039.92
  4. Step 4: Simplify right side
    620,660.72x = 313,553,119,114.47
  5. Step 5: Solve for x
    x = 313,553,119,114.47/620,660.72
  6. Step 6: Final answer
    x = 505,192.47

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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.