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Finding the Fourth Proportional to 654,379.67, 981,581.81 and 205,090.59

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Solution

The fourth proportional to 654,379.67, 981,581.81 and 205,090.59 is: 307,639.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,379.67 : 981,581.81 = 205,090.59 : x
  2. Step 2: Convert to fraction form
    654,379.67/981,581.81 = 205,090.59/x
  3. Step 3: Cross multiply
    654,379.67x = 981,581.81 × 205,090.59
  4. Step 4: Simplify right side
    654,379.67x = 201,313,191,520.72
  5. Step 5: Solve for x
    x = 201,313,191,520.72/654,379.67
  6. Step 6: Final answer
    x = 307,639.74

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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.