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Finding the Fourth Proportional to 640,129.28, 960,796.50 and 324,812.48

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Solution

The fourth proportional to 640,129.28, 960,796.50 and 324,812.48 is: 487,524.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,129.28 : 960,796.50 = 324,812.48 : x
  2. Step 2: Convert to fraction form
    640,129.28/960,796.50 = 324,812.48/x
  3. Step 3: Cross multiply
    640,129.28x = 960,796.50 × 324,812.48
  4. Step 4: Simplify right side
    640,129.28x = 312,078,693,940.32
  5. Step 5: Solve for x
    x = 312,078,693,940.32/640,129.28
  6. Step 6: Final answer
    x = 487,524.48

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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.