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Finding the Fourth Proportional to 640,996.89, 961,140.38 and 262,183.64

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Solution

The fourth proportional to 640,996.89, 961,140.38 and 262,183.64 is: 393,130.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,996.89 : 961,140.38 = 262,183.64 : x
  2. Step 2: Convert to fraction form
    640,996.89/961,140.38 = 262,183.64/x
  3. Step 3: Cross multiply
    640,996.89x = 961,140.38 × 262,183.64
  4. Step 4: Simplify right side
    640,996.89x = 251,995,277,262.76
  5. Step 5: Solve for x
    x = 251,995,277,262.76/640,996.89
  6. Step 6: Final answer
    x = 393,130.27

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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.