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Finding the Fourth Proportional to 640,940.98, 961,338.03 and 167,672.02

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Solution

The fourth proportional to 640,940.98, 961,338.03 and 167,672.02 is: 251,488.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,940.98 : 961,338.03 = 167,672.02 : x
  2. Step 2: Convert to fraction form
    640,940.98/961,338.03 = 167,672.02/x
  3. Step 3: Cross multiply
    640,940.98x = 961,338.03 × 167,672.02
  4. Step 4: Simplify right side
    640,940.98x = 161,189,489,392.92
  5. Step 5: Solve for x
    x = 161,189,489,392.92/640,940.98
  6. Step 6: Final answer
    x = 251,488.82

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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.