Home / 427,217.05-640,448.44-161,164.40

Finding the Fourth Proportional to 427,217.05, 640,448.44 and 161,164.40

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Solution

The fourth proportional to 427,217.05, 640,448.44 and 161,164.40 is: 241,604.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,217.05 : 640,448.44 = 161,164.40 : x
  2. Step 2: Convert to fraction form
    427,217.05/640,448.44 = 161,164.40/x
  3. Step 3: Cross multiply
    427,217.05x = 640,448.44 × 161,164.40
  4. Step 4: Simplify right side
    427,217.05x = 103,217,488,563.54
  5. Step 5: Solve for x
    x = 103,217,488,563.54/427,217.05
  6. Step 6: Final answer
    x = 241,604.33

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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.