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Finding the Fourth Proportional to 640,553.28, 959,430.24 and 324,467.52

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Solution

The fourth proportional to 640,553.28, 959,430.24 and 324,467.52 is: 485,992.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,553.28 : 959,430.24 = 324,467.52 : x
  2. Step 2: Convert to fraction form
    640,553.28/959,430.24 = 324,467.52/x
  3. Step 3: Cross multiply
    640,553.28x = 959,430.24 × 324,467.52
  4. Step 4: Simplify right side
    640,553.28x = 311,303,950,585.81
  5. Step 5: Solve for x
    x = 311,303,950,585.81/640,553.28
  6. Step 6: Final answer
    x = 485,992.28

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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.